If you want others to be happy, practice compassion. If you want to be happy, practice compassion.The Dalai Lama — as attributed
Compassion is the capacity to perceive the suffering of another person and to be moved by that perception toward action. It is not sympathy, which feels for the other from a distance. It is not pity, which regards the other as beneath oneself. Compassion requires genuine encounter — the willingness to allow another person's reality to matter to you in a way that costs something.
Every major philosophical and religious tradition has placed it at or near the center of the moral life. For Confucius, ren — benevolence — is the supreme virtue from which all others flow. For the Buddhist tradition, karuna — compassion — is one of the four immeasurable qualities of a fully developed mind. For Desmond Tutu and the Ubuntu philosophy of southern Africa, compassion is not a virtue added to human nature but a structural feature of it: I am because we are, and your suffering is therefore not separate from mine.
Adam Smith, in his Theory of Moral Sentiments, grounded the entire edifice of moral life on sympathy — the capacity to imaginatively enter into the experience of another and to be affected by what we find there. This is not sentiment separate from reason. It is, for Smith, the source of our moral concepts: what is right and wrong cannot be derived from pure logic but emerges from the encounter between persons who can genuinely perceive each other's inner states.
The practical consequence of compassion is service — the willingness to give what is needed without calculating the return. Albert Schweitzer gave up a world-class career to run a hospital in equatorial Africa. His account of why was not heroic but simple: he could help, and therefore he should. The logic of compassion is that stark. Perceive the need. Have the capacity. Act.