The yoga Vasishta is a wonderful book in this world. The non-dual Brahman alone exixts. This world does not exist in the three periods of time. Knowledge of the self alone will free one from the rounds of birth and death.

Extinction of vasanas [cravings] is Moksha. Mind generates this universe through Sankalpa [thought].
Annihilate the little ‘I’, Vasanas and Sankalpa.
Meditate on the self and become a Jivanmukta.This is the gist of the yoga Vasishtha.