Liberation and ego
Although there is no ego in the spiritual planes, yet by the spiritual experience the ego on the lower planes may get aggrandised through the pride and wrong reception of the experience. Also one may by entering into the larger mental and vital planes aggrandise the ego. These things are always possible so long as the higher consciousness and the lower are not harmonised in the being and the lower transformed into the nature of the higher.
Ego is not so easy to get rid of. It remains not only in spite of work but in spite of knowledge or bhakti. The disappearance of ego means complete Mukti. Even the yogi who feels his separate being swallowed up in cosmic consciousness or some kind of Transcendent consciousness, yet when he comes to outward action and reaction finds the superficial ego still there. That is why the ascetic has a horror of action and says that without ego it can’t be done. It can, but it is fully done only when these outermost things are fully taken up by the higher consciousness in their entirety.
The sense of ego can disappear into that of the Self or the Purusha but that of itself does not bring about the disappearance of the old ego-reactions in the Prakriti. The Purusha has to get rid of these by a process of constant rejection and remoulding. The remoulding consists in throwing everything into a consecration to the Mother and doing all for her without regard to oneself, one’s desires, opinions, vital reactions as if they were the things to be fulfilled. This is most easily done if the psychic being becomes quite awake.
Without persistent rejection it [liberation from the ego] cannot be done. Going up into the Self liberates the higher parts, but the ego remains in the lower parts. The most effective force for this liberation is the psychic control along with steady rejection.
A true spiritual experience must be free from the claim of the ego. What the ego can do, however, is to get proud of having the experience and think: “What a great one am I?” Or it may think, “I am the Self, the Divine. So let me go and do what I will, for it is the Divine who wills in me.” It is only if the experience of Self imposes silence on the other parts and frees the psychic that the ego disappears. Even if not ego itself, numerous fragments and survivals of ego-habit can remain and have to be eliminated.
The egoism of the instrument can be as dangerous or more dangerous to spiritual progress than the egoism of the doer. The ego-sense is contrary to spiritual realization, so how can any kind of ego be a thing to be encouraged? As for the magnified ego, it is one of the most perilous obstacles to release and perfection. There should be no big I, not even a small one.
What is meant by the magnified ego is that when the limits of the ordinary mind and vital are broken, one feels a far vaster and more powerful consciousness and unlimited possibilities, but if one ties all that to the tail of one’s own ego, then one becomes a thousand times more egoistic than the ordinary man. The greatness of the Divine becomes an excuse and a support for one’s own greatness and the big I swells itself to fill not only the earth but the heavens. That magnification of the ego is a thing to be guarded against with a watchful care.
Sri Aurobindo, Letters on Yoga – III: Transformation of the Vital –