The vital or desire has its own limited intellect, its own ego and its physical aspect. For eg. the physical aspect is the sexual desire. It only seeks satisfaction for its own satisfaction and not for the satisafaction of the body. (Sri Aurobindo).
When the vital or desire surrenders, it no longer insists on its own personal satisfaction, there is a sense of peace and relief. At this point, the vital either becomes the true vital or the true vital is revealed. (Sri Aurobindo). The true vital does not have ego as we know of it. Sri Ramkrishna Paramhansa said it great words. “Who knows how and where it comes from but once we return from the Brahman stage, the ego returns also. It is ok to have the ego of being Gods servant or the ego of knowledge or the ego of devotion.”
Most people mistake arrogance or the superfical ego (which comes from an extremely premature thought(acquired by reading orhearing)of having knowledge, devotion or being Gods servant.
The true vital and the sense in which Ramkrishna used the words of saying it is ok to have the ego of being Gods servant etc can only be understood, experienced and revealed when the vital or desire has surrendered to God and no longer insists on fulfilment of itself. What is the test to this? When the desire is not fulfilled, there is no reaction of disappointment or anger that the wish was not fulfilled. The vital silently, happily turns to God! At this point, most of the anger, sadness other qualities should disappear or be reduced substantially.
The biggest problem with all the spiritual discussions and reading spiritualbooks is that people may read it but their ego, vanity and in their haste to make progress, willingly, wilfully and often foolishly mistake a pseudo progress as the final, ultimate progress