Then, as now, people were obsessed with love. But Epicurus observed that happiness and love (let alone marriage) almost never go together. There is too much jealousy, misunderstanding and bitterness. Sex is always complicated and rarely in harmony with affection. It would be best, Epicurus concluded, never to put too much faith in relationships. By contrast, he noted how rewarding most friendships are: here we are polite, we look for agreement, we don’t scold or berate and we aren’t possessive. But the problem is we don’t see our friends enough.

