Sacrifice and self-giving are indeed a true principle

Altruism taken as a rule of life does not deliver us; it is a potent instrument for self-enlargement and for correction of the narrower ego, but it does not abolish it nor transform it into the true self one with all; the ego of the altruist is as powerful and absorbing as the ego of the selfish and it is often more powerful and insistent because it is a self-righteous and magnified ego. It helps still less if we do wrong to our soul, to our mind, life or body with the idea of subordinating our self to the self of others.

To affirm our being rightly so that it may become one with all is the true principle, not to mutilate or immolate it. Self-immolation may be necessary at times, exceptionally, for a cause, in answer to some demand of the heart or for some right or high purpose but cannot be made the rule or nature of life; so exaggerated, it would only feed and exaggerate the ego of others or magnify some collective ego, not lead us or mankind to the discovery and affirmation of our or its true being. Sacrifice and self-giving are indeed a true principle and a spiritual necessity, for we cannot affirm our being rightly without sacrifice or without self-giving to something larger than our ego; but that too must be done with a right consciousness and will founded on a true knowledge.

To develop the sattwic part of our nature, a nature of light, understanding, balance, harmony, sympathy, good-will, kindness, fellow-feeling, self-control, rightly ordered and harmonised action, is the best we can do in the limits of the mental formation, but it is a stage and not the goal of our growth of being.

The Life Divine by Sri Aurobindo Book 2 - Part 2 - Chapter 2-14 The Origin and Remedy of Falsehood, Error, Wrong and Evil intyoga.online.fr