The jiva-souls (marginal living entities) are eternal PERSONS as a spiritual bodily form like Krsnas Body, and whose eternal home is the spiritual world.

Kṛṣṇa’s first expansion is Balarama from whom all Visnu-tattva expansions manifest however, all manifestions including the jiva-souls, are beginningless and endless because they are eternally part and parcel of Kṛṣṇa. 

And for Kṛṣṇa to experience loving relations with a women, He divided Himself into two, and that is how Radharani appears. However, the paradox is both are eternal because Radharani is eternally part of Kṛṣṇa.

Kṛṣṇa as His original form NEVER leaves Vṛndāvana in the spiritual world. 

All of Krsna’s pastimes in the material creation including killing demons, are carried out by Krsna's Visnu-tattva expansion. In the spiritual world no demons exist or are killed by Krsna and Balarama. 

Srila Prabhupada - "When Kṛṣṇa kills the demons outside Vṛndāvana, He is not original Kṛṣṇa; He is Vāsudeva. Vāsudevaḥ sarvam iti (BG 7.19). When Kṛṣṇa is acting universally, that is Vāsudeva. The original Kṛṣṇa is always in Vṛndāvana and never leaves."  (Morning Walk, July 17, 1975, San Francisco)

Srila Prabhupada - "The original Lord Kṛṣṇa never leaves Goloka Vṛndāvana. All the plenary expansions are one and the same Viṣṇu-tattva, and there is no difference in Their potency." (SB, Canto 3 Ch 1 Text 34)

Srila Prabhupada - "Kṛṣṇa is the original Supreme Personality of Godhead, and Baladeva (Balarama) is Kṛṣṇa's immediate expansion. Because Kṛṣṇa NEVER leaves Vṛndāvana, all the forms of Kṛṣṇa that appear elsewhere are His expansions." (BG, As It Is Ch 10 Text 37)

Also, the intense separation Radharani and the gopis feel for Kṛṣṇa, only happens in the facsimile Vrindavana in the material world and not in the spiritual world. The word Vaikuntha means "without anxiety" therefore how could there be demons there? And how could the gopis ever feel separation from Kṛṣṇa there? After all Krsna NEVER leaves Goloka Vrindavana.

Jayatīrtha - "If the original Kṛṣṇa is always in Vṛndāvana, then why do the gopīs and Rādhārāṇī feel separation from Him?"

Srila Prabhupada - "That is here, in this material world. In the spiritual world Kṛṣṇa does not leave."

Jayatīrtha - "Oh."

Srila Prabhupāda - "And even in the material world, Kṛṣṇa superficially has gone to Mathurā, but He has captured the heart of the gopīs. So He is not leaving. Gopīs are enjoying Kṛṣṇa by separation. That is Caitanya Mahāprabhu's feeling, how He is appreciating Kṛṣṇa by separation." (Morning Walk, July 17, 1975, San Francisco)

The full potential and original feature of all marginal living entities (jiva-souls) is a two arm form like Krsna's Bodily Form.

Srila Prabhupada - "The human form is the full manifestation of the jiva-soul." (Melb, May 20, 1975)

Srila Prabhupada - "The spirit soul is NOT formless; it has got form, the spirit soul always has form and is expressed as hands, legs, heads, everything. But with our material eyes at the present, our gross eyes, we cannot see these facts; therefore we foolishly believe the jiva-souls have no form." (Lecture on BG 2.14 - Mexico, Feb 14, 1975)

Devotee – "Is the original body of the spirit soul a human form?"

Srila Prabhupada – "Yes, human form. God is also human form. "Man is made after the shape of God." I think there is in the Bible. Is it not? So God is also like human form. Here you see Krsna, two hands, two legs."

Hari-sauri – "How do we understand, then, that there are peacocks and flowers and trees in the spiritual world? Are these not eternal forms?"

Srila Prabhupada – "[describing material form first]: Yes. They are more covered. Just like if you cover your body with blanket, the hands and legs are invisible. But you are not the blanket. So the trees and plants, they are more covered. They are not in full manifestation. The human form is the full manifestation of the soul."

Hari-sauri - "They are covered in the spiritual world?"

Srila Prabhupada - "Not in the spiritual world. There that is voluntary. Some devotee wants to serve Krsna as flower; they become flower there. If I want to be a flower I shall lie down at the lotus feet of Krsna, he becomes flower, voluntarily, and he can change his, from flower to human body. That is spiritual life. There is no restriction. If some devotee wants to serve Krsna as cow, he serves Krsna as cow, as calf, as flower, as plant, as water, as ground, field, or as father, as mother, as friend, as beloved, anything. It is inconceivable, yet a fact." (SB, Canto 6 Ch 1 text 1-4 Melb, May 20, 1975)

Srila Prabhupāda - "The impersonal conception of the Supreme is so detrimental to the path of devotional service that it is very difficult to associate with the stubborn nondevotees, who always think in terms of material conceptions. Impersonalists always think backwards. They think that because there is form in matter, spirit should be formless; because in matter there is sleep, in spirit there cannot be sleep; and because the sleeping of the Deity is accepted in arcanā worship, the arcanā is māyā. All these thoughts are basically material. To think either positively or negatively is still thinking materially. Knowledge accepted from the superior source of the Vedas is standard." (SB, Canto 3 Ch 9 text 21, Purport)

Srila Prabhupada - "Each person is eternal. Because the Lord says that He existed as a person before the creation (agre) and will also exist after the annihilation, the Lord is a person eternally. 

Śrīla Viśvanātha Cakravartī Ṭhākura therefore quotes these verses from Śrīmad-Bhāgavatam (10.9.13-14)-

na cāntar na bahir yasya

na pūrvaṁ nāpi cāparam

pūrvāparaṁ bahiś cāntar

jagato yo jagac ca yaḥ

taṁ matvātmajam avyaktaṁ

martya-liṅgam adhokṣajam

gopikolūkhale dāmnā

babandha prākṛtaṁ yathā

The Personality of Godhead appeared in Vṛndāvana as the son of mother Yaśodā, who bound the Lord with rope just as an ordinary mother binds a material child. There are actually no divisions of external and internal for the form of the Supreme Personality of Godhead- (sac-cid-ānanda-vigraha [Bs. 5.1), but when He appears in His own form the unintelligent think Him an ordinary person. 

Avajānanti māṁ mūḍhā mānuṣīṁ tanum āśritam: (BG 9.11) although He comes in His own body, which never changes. mūḍhas, the unintelligent, think that the impersonal Brahman has assumed a material body to come in the form of a person. Ordinary living beings assume material bodies, but the Supreme Personality of Godhead does not. 

Since the Supreme Personality of Godhead is the supreme consciousness, it is stated herein that saṁjñāna-mātram, the original consciousness, Kṛṣṇa consciousness, was unmanifested before the creation, although the consciousness of the Supreme Personality of Godhead is the origin of everything.

Bhagavad Gita As It Is - "Never was there a time when I did not exist, nor you, nor all these kings; nor in the future shall any of us cease to be." (BG, Ch 2 Text 12)

Thus the Lord's person is the Absolute Truth in the past, present and future. In this regard, Madhvācārya quotes two verses from the Matsya Purāṇa:

nānā-varṇo haris tv eko

bahu-śīrṣa-bhujo rūpāt

āsīl laye tad-anyat tu

sūkṣma-rūpaṁ śriyaṁ vinā

asuptaḥ supta iva ca

mīlitākṣo 'bhavad dhariḥ

anyatrānādarād viṣṇau

śrīś ca līneva kathyate

sūkṣmatvena harau sthānāl

līnam anyad apīṣyate

After the annihilation of everything, the Supreme Lord, because of His sac-cid-ānanda-vigraha (Bs. 5.1), remains in His original form, but since the other living entities have material bodies, the matter merges into matter, and the subtle form of the spirit soul remains within the body of the Lord. The Lord does not sleep, but the ordinary living entities (jiva-souls) remain asleep until the next creation. 

This because the fallen jiva-souls are still "outside" of the spiritual world's of the Vaikuntha planets, and Goloka-Vrindavana. 

Their real home and spiritual bodily form eternally exists in the spiritual world. 

Therefore, being "outside" the spiritual world means they are trapped in the temporary material world, or merged as an individual dormant unit [spark] in the impersonal Brahmajyoti. The opulence of the Supreme Personality of Godhead remains as it is in the spiritual world; only in the material world is everything dissolved. 

Brahma-līna, merging into the Supreme Brahman (Brahmajyoti), is not actual līna, or annihilation, for the subtle form remaining in the Brahman effulgence will return to the material world after the material creation and again assume a material form. 

This is described as bhūtvā bhūtvā pralīyate (BG 8.19). 

When the material body is annihilated, the spirit soul remains in a subtle form, which later assumes another material body. 

This is true for the conditioned souls, but the Supreme Personality of Godhead remains eternally in His original consciousness and spiritual body." (SB, Canto 6 Ch 4 text 47, Purport)

Devotee - "I want to know exactly what is the form of the body. If the spirit soul (jiva-soul) is nonmaterial, what is the form?"

Srila Prabhupāda - "There is form. Just like this body is compared with the dress. Now, just like in your present material form you have got hand; therefore your coat has got hand, you have got leg; therefore your pant has got leg. 

Therefore, it is to be assumed that the spirit soul has got form, and it has developed into hands, legs, heads, everything. It is not formless; it has got form. But with our material eyes at the present, gross eyes, we cannot find it; therefore we say it has no form." (Lecture BG, Ch 2 text 14 Mexico, Feb 14, 1975)

Devotee - "Śrīla Prabhupāda, you state that spirit soul has form."

Srila Prabhupāda - "Yes."

Devotee - "Otherwise, how is the material body grown to accommodate the spirit soul? Just like a shirt has no form, but when it's put on the body, it takes the shapes of the body. Does that mean that the spirit soul has the shape of the body that is accommodating it?"

Srila Prabhupāda - "Yes, you have got body, shape, very minute shape. That we cannot see, we cannot measure. Therefore in the Bhagavad-gītā it is said, anumeyam, hat is that? You cannot measure. What is that word used? Aprameyam. Aprameyam. You cannot measure. But it has a form. 

How, what is the length and breadth of that form, that is not in your power. In your power, but not materially. 

That is if you have got spiritual power, then you can measure it. And that measurement is also given in the śāstra. What is that? 

One ten-thousandth part of the tip of the hair. Hair is a very small point. And divide it into ten thousand parts. That one part is the measure, magnitude of the soul.

keśāgra-śata-bhāgasya

śatadhā kalpitasya ca

jīva-bhāgaḥ sa vijñeyaḥ

sa cānantyāya kalpate

(CC Madhya 19.140)

Everything is there. But you have no eyes to see, how to see one ten-thousandth portion of the top of the hair. You cannot see even the original top of the hair. Everything is there. We must have eyes." (Lecture SB, Canto 1 Ch 16 text 24 Hawaii, Jan 20, 1974)

Srila Prabhupāda - "This jagat, this material world, is existing on the spiritual prakṛti. You can calculate what is this body. This body is existing on the spiritual body. Just like your shirt. The shirt is existing on your actual hand. The shirt has got a hand because you have got hand. 

So matter or material energy is impersonal. But because the superior prakṛti, jīva-soul, he is person, therefore the matter appears like a person. 

Because I have got hands and legs, therefore this cloth has got hands and legs. Otherwise the cloth has no hands and legs; it is impersonal. And in the Bhagavad-gītā it is said, vāsāṁsi jīrṇāni. 

This body is just like dress, just like your coat has got hand, your pant has got leg, but either the pant or coat has no leg, no hand, but because you have got leg and hand, therefore the coat has got leg and hand. 

Everyone can understand this, it is very easy. So the original position of the spirit soul has form, therefore the cloth has been cut into form. 

It is very easy to understand, otherwise how you get the form? And in this form the spirit soul is trying to enjoy this material world. But it is not puruṣa. It cannot enjoy. That is false. That is illusion." (Lecture SB, Canto 3 Ch 26 text 3 Bombay, Dec 15, 1974) 

Srila Prabhupada - "We are not studying what kind of dress you have got. Now, you are also not studying what kind of dress I have got. We are concerned with philosophy, with knowledge. 

Similarly, we are not concerned whether you are American or Englishman or African or this or that, a cat or dog. We want to give you Kṛṣṇa consciousness, because everyone is conscious. So that consciousness has to be changed. That is Kṛṣṇa consciousness movement. 

One has to become clear of these designations-

I am Indian,

I am American,

I am brāhmaṇa, 

I am Muslim,

I am Christian,

I am Hindu.

These are all designations. So we have to become free from these designations by coming to the spiritual platform.

Sarvopādhi-vinirmuktaṁ tat-paratvena nirmalam. Nirmalam means without any... Hṛṣīkeṇa hṛṣīkeśa-sevanaṁ bhaktir ucyate (CC Madhya 19.170). 

When you come to that purest form of spirit soul, you don't think that your indriyas, or senses, are lost. No. Senses are there. 

At that time, if you enjoy your senses in cooperation with the Supreme, that is called bhakti, or Kṛṣṇa consciousness." (Lecture SB, Canto 5 Ch 5 text 1 London, Aug 30, 1971) 

Devotee - "Would the spirit soul within a cow's body be in a different shape?"

Srila Prabhupāda - "Yes, it has got also legs. But the shape has taken according to his desire (voluntary). Every animal has got these four things. 

Just like bird, it has got two wings, two legs. The animal has got four legs. And the man has got two hands, two legs. So the same parts of the body, they are appearing in a different type. But the four limbs of the body are there."

Devotee - "Is the original body of the spirit soul a human form?"

Srila Prabhupāda - "Yes, human form. God is also human form. "Man is made after the shape of God." I think there is in the Bible. Is it not? So God is also like human form. Here you see Kṛṣṇa, two hands, two legs."

Hari-śauri - "How do we understand, then, that there are peacocks and flowers and trees in the spiritual world? Are these not eternal forms?"

Srila Prabhupāda - "Yes, but in the material world they are restricted, they are more covered, just like if you cover your body with blanket, the hands and legs are invisible. But you are not the blanket. So the trees and plants, they are more covered. They are not in full manifestation. The human form is the full manifestation of the jiva-soul."

Hari-śauri - "They are covered in the spiritual world?"

Srila Prabhupāda - "Not in the spiritual world, there that is voluntary, some devotee wants to serve Kṛṣṇa as flower; they become flower there. If I want that "As a flower I shall lie down at the lotus feet of Kṛṣṇa," he becomes flower, voluntarily. And he can change his..., from flower to human body. That is spiritual life. There is no restriction. If some devotee wants to serve Kṛṣṇa as cow, he serves Kṛṣṇa as cow, as calf, as flower, as plant, as water, as ground, field, or as father, as mother, as friend, as beloved, anything. Ye yathā mām prapadyante tāṁs tathaiva bhajāmy aham (BG 4.11). That is Kṛṣṇa's all-powerfulness, this is spiritual life." (Lecture SB, Canto 6 Ch 1 text 1 Melb, Australia, May 21, 1975)

Srila Prabhupāda - "In Vaikuṇṭha, people, they also dress with yellow cloth, pīta-kauśeya, or this saffron color. This is Vaikuṇṭha dress. Kauśeya, pīta, the dress, garments. Kirīṭinaḥ: "with helmets." Kuṇḍalinaḥ: "with nice earring." Kirīṭinaḥ kuṇḍalino lasat-puṣkara-mālinaḥ, "and very nice flower garland." This is Vaikuṇṭha dress. Lasat-puṣkara-mālinaḥ, sarve ca nūtna-vayasaḥ: all young men. In Vaikuṇṭha there is no old age, although they are eternal. That is the real form of the spirit. The old age is due to this body, material body. Material thing is born and stays for some time, and then it is annihilated. So, up to the time of annihilation, it becomes so old, nasty, bad-looking. But in the Vaikuṇṭha there is no such thing. Nityaḥ śāśvato 'yam. The Vaikuṇṭha planet, because that is spiritual body, that is nityaḥ śāśvataḥ." (Lecture SB, Canto 6 Ch 1 text 33 San Francisco, July 18, 1975)