Jiva who wants to develop life and has heartfelt desire to do Sadhana of life, such Jiva will always continue to forget the self. Without that, the Jiva will not be able to find the self. Sadhana begins with the sacrifice of 'I AM' or 'ME' and completed or better word is 'final end' is in the complete destruction of ego.
It is not possible to destroy 'I AM'. It is also one form of reality (Tatwa, તત્વ). Meaning of 'I AM' is one kind of Nature or characteristic that can propel in the Aakash (Sky). Destruction of Nature or characteristic are never possible. Only sublimation is possible. So it is never destroyed completely. If we surmise the meaning of sublimation as 'complete cleansing' it is more appropriate.
As the ego gets subtler, its hold on us also gets subtler and strong. At this time, it is difficult to judge and identify its strength. So, how can we catch it? It is possible that apparently egoless Jiva may be full of ego. It is like when there is lot of speed in the movement of a top, it appears still. If someone who is proud of the intellect say that 'we will be able to reduce or sublimate the ego with the help of the intellect,' it is useless illusion. In fact the subtlety of intellect makes the ego more subtle. So ego cannot be destroyed by intellect.
Pujya Shree Mota
Jivan Yog, Edition 1,
Part 1, Pages 370 - 371.