Two souls, one heart.

This brief proverb expresses an ideal of perfect union between two people: they remain distinct “souls” (separate persons, minds, or lives) yet share a single “heart,” suggesting a unified will, affection, and moral center. It is commonly used to describe lovers or spouses, but it can also apply to profound friendship or kinship—any bond in which empathy and loyalty are so complete that decisions and feelings seem jointly held. The phrasing emphasizes harmony rather than erasure of individuality: two inner lives persist, but their emotional allegiance is shared. As a maxim, it functions less as a factual claim than as a poetic aspiration for intimacy and mutual understanding.