There is only one happiness in this life: to love and be loved.
What makes Sand's observation cut deeper than mere sentimentality is her refusal to separate loving from *being* loved—she's insisting that happiness requires the vulnerability of reciprocity, not the comfort of one-sided devotion. We often assume that giving love ennobles us regardless of whether it's returned, but Sand suggests that's a half-life. Consider the parent who pours affection into a child who remains distant and ungrateful; Sand wouldn't call that happiness, however much love is being offered. Her real claim is almost austere: authentic joy demands we risk being known and chosen by another person, not merely that we choose them.