Advaita Vedanta Basics - VigyanMaya Kosha (Vivek Choodamani / Chudamani)

198-199. Avidya or Nescience and its effects are likewise considered as beginningless. But with the rise of Vidya or realisation, the entire effects of Avidya, even though beginningless, are destroyed together with their root – like dreams on waking up from sleep. It is clear that the phenomenal universe, even though without beginning, is not eternal – like previous non-existence.

200-201. Previous non-existence, even though beginningless, is observed to have an end. So the Jivahood which is imagined to be in the Atman through its relation with superimposed attributes such as the Buddhi, is not real; whereas the other (the Atman) is essentially different from it. The relation between the Atman and the Buddhi is due to a false knowledge.

Source: Vivek Choodamani