No partner in a love relationship... should feel that he has to give up an essential part of himself to make it viable.

Sarton’s remark argues for a model of love grounded in integrity rather than self-erasure. A relationship may require compromise, but it becomes unhealthy when one person must abandon “an essential part” of identity—core values, vocation, temperament, or creative life—to keep the partnership intact. The quote implicitly critiques possessiveness and social expectations (including gendered ones) that equate devotion with sacrifice of self. It also suggests that genuine intimacy depends on two whole persons who can grow alongside each other; if viability depends on mutilating the self, the relationship’s stability is purchased at the cost of authenticity and long-term resentment.