The Art of Loving - Erich Fromm

Love is a decision, it is a judgment, it is a promise. If love were only a feeling, there would be no basis for the promise to love each other forever. A feeling comes and it may go. How can I judge that it will stay forever, when my act does not involve judgment and decision.

Mature love is union under the condition of preserving one’s integrity, one’s individuality. Love is an active power in man; a power which breaks through the walls which separate man from his fellow men, which unites him with others; love makes him overcome the sense of isolation and separateness, yet it permits him to be himself, to retain his integrity. In love the paradox occurs that two beings become one and yet remain two.

In erotic love, two people who were separate become one. In motherly love, two people who were one become separate.

“Infantile love follows the principle: "I love because I am loved."
Mature love follows the principle: "I am loved because I love."
Immature love says: "I love you because I need you."
Mature love says: "I need you because I love you.”