This material creation is the spirit soul's dream. Actually all existence in the material world is a dream of Maha-Vishnu

Srila Prabhupada - “As living spiritual souls, we are all originally Krishna conscious entities, but due to our association with matter from time immemorial, our consciousness is now polluted by the material atmosphere, called Maya, or illusion”. And what is this illusion? The illusion is that we are all trying to be lords of material nature, while actually we are under the grip of her stringent laws. When a servant artificially tries to imitate the all-powerful master, he is said to be in illusion. Hare Krishna Album 1966

When the Mayavadis say the world is an illusion, to them nothing is real because they have no concept that Krishna is the Supreme Creator and is forever enjoying His eternal pastimes within the eternal 'presence’ of Goloka, the undeviating immortal Kingdom of God. The devotees of Krishna see that if one’s behaviour is not everlasting, then that must illusion, only because it does not include Krishna. Prabhupada constantly uses the word ‘illusion’ in his preaching to point this fact out, that which is illusion means it is temporary, decaying, fading, to the point that eventually it will appear as if it never was – that which is not - Maya.

Srila Prabhupada explains how the non-Krishna conscious rebellious dreams (nitya-baddha consciousness) are sub-consciously projected from one's marginal identity in Goloka and transferred to the ‘creation of the dreaming’ known as the mahat-tattva creation of Maha-Vishnu.

This secondary reality or mahat-tattva (material creation) is set up for the secondary (conditioned) extension of the marginal living entities known as the nitya-baddha condition of restricted awareness. Such restricted awareness manifests as a dreaming condition of non-Krishna conscious thoughts and desires that are housed in material bodily forms

Srila Prabhupada  – “So this dreaming condition is called non-liberated life (nitya-baddha), and this is just like a dream. Although in this material calculation it is a long, long, long, long, long, long period, as soon as we come to Krishna consciousness then this period (nitya-baddha) is considered as a second”.http://prabhupadabooks.com/?g=170123

Srila Prabhupada   - “By following the rules and regulations and instructions of the spiritual master, he can again become nitya-siddha. So the Krsna consciousness movement is to nitya-baddhas again nitya-siddha. Caitanya Caritamrta Madhya 20.107 New York, 76

Srila Prabhupada  – “This material creation is the spirit soul's dream. Actually all existence in the material world is a dream of Maha-Vishnu, as the Brahma-Samhita describes –  This material world is created by the dreaming of Maha-Vishnu. The real, factual platform is the spiritual world, but when the spirit soul wants to imitate the Supreme Personality of Godhead, he is put into this dreamland of material creation”. 4.29.83.http://vedabase.net/sb/4/29/83/en

Srila Prabhupada - “Everything happening within time, which consists of past, present and future, is merely a dream. This is the secret in understanding in all the Vedic literature.” SB. 4.29.2b.

Srila Prabhupada - “Of course, everyone has a particular relationship with the Lord, and that relationship is evoked by the perfection of devotional service. But in the present status of our life, we have not only forgotten the Supreme Lord, but we have forgotten our eternal relationship with the Lord”. Bhagavad-Gita, Introduction

Srila Prabhupada - “There is possibility (falling from Vaikuntha), if you do not stick to the spiritual principle, even if you are in Vaikuntha, you will fall down, what to speak of this material world? Because in the Vaikuntha or in the spiritual world, no contaminated soul can stay there. He will fall down”. Bhag.-Gita class, Honolulu: July 4, 1974)

Srila Prabhupada tells us that we have never been always conditioned as nitya-baddha because we have come from Goloka, rather, it is only our 'dreaming' non Krishna consciousness that comes to the mahat-tattva and not our nitya-siddha body due to not being able to exist within the eternal presence of Krishna Consciousness there.

The nitya-baddha consciousness therefore finds a home in subtle and gross material bodily vessels in the mahat-tattva that are temporary, our nitya-baddha conscious condition is also only temporary because ultimately and perpetually, we are all nitya-siddha in Goloka

In this way, just as the sun dissipates the darkness, when one is AGAIN fully established as their nitya-siddha authentic eternal body, the darkness or the nitya-baddha counterfeit non-Krishna consciousness will simply not exist. This is because the nitya-baddha feature of ones marginal identity can never exist in Goloka-Vrndavana or Vaikuntha in the presence of Krishna and ones nitya-siddha body, darkness cannot exist where there is light.