“When I fall in love, I feel more valuable and I treat myself with more care. We have all observed the hesitant adolescent, uncertain of himself, who, when he or she falls in love, suddenly walks with a certain inner assuredness and confidence, a mien which seems to say, "You are looking at somebody now." … this inner sense of worth that comes with being in love does not seem to depend essentially on whether the love is returned or not.”

Source: Belinda

Source: The Bell Jar (1963), Ch. 9

"Clown", Charmbracelet, 2002. Supposedly written about Carey’s brief relationship with Eminem
Lyrics

Source: What Men Live By (1881), Ch. XII
Context: And the angel's body was bared, and he was clothed in light so that eye could not look on him; and his voice grew louder, as though it came not from him but from heaven above. And the angel said:
I have learnt that all men live not by care for themselves, but by love.
It was not given to the mother to know what her children needed for their life. Nor was it given to the rich man to know what he himself needed. Nor is it given to any man to know whether, when evening comes, he will need boots for his body or slippers for his corpse.
I remained alive when I was a man, not by care of myself, but because love was present in a passer-by, and because he and his wife pitied and loved me. The orphans remained alive, not because of their mother's care, but because there was love in the heart of a woman a stranger to them, who pitied and loved them. And all men live not by the thought they spend on their own welfare, but because love exists in man.
I knew before that God gave life to men and desires that they should live; now I understood more than that.
I understood that God does not wish men to live apart, and therefore he does not reveal to them what each one needs for himself; but he wishes them to live united, and therefore reveals to each of them what is necessary for all.
I have now understood that though it seems to men that they live by care for themselves, in truth it is love alone by which they live. He who has love, is in God, and God is in him, for God is love.

Source: Lover Eternal

Variant: I would prove to the men how mistaken they are in thinking that they no longer
fall in love when they grow old--not knowing that they grow old when they stop
falling in love.

Source: Microserfs

Source: Castle of Wizardry