The knowledge, realization and awareness of the true state of all that is: The Primordial Void.
Upon Realizing it, one realizes that the essence of all is null and recognizes the entire system of the cosmos and everything within and without as a mere illusion generated by Ignorance of it caused by the neglection of the true nature of the Primordial Void.
Thus within the Pure Wisdom of True Wisdom does all other forms of wisdom are rendered null and dissolve back to the pure state of the Primordial Void.
One does not dissolve into nothingness and reality does not stop existing, one merely recover the connection with the supreme state of all things and sees itself inseparable from the Primordial void, thus inseparable of all that is.