“To love a person who loves another, that is the only unhappiness in the world.”Victor Hugo · Mizerabilii · 1862 · Partea a IV-a, cartea a II-a, capitolul IV
Death leaves a wound that can close, but unrequited love keeps the pain alive daily, because the beloved stays present.
Hugo is not talking about death, poverty, or illness, but about one specific form of unhappiness. The reason is simple: loss through death leaves a wound that can close, but unrequited love keeps its object alive and visible every day. Whoever lives it watches the beloved be happy with someone else, and hope never quite dies, which prolongs the pain instead of ending it.
Why it matters The line gives a name to a pain rarely spoken about and shows why it does not heal easily: because it is not a loss but a constant presence of someone else in your life.