The Metaphysical Elements of Ethics

by Immanuel Kant translated by Thomas Kingsmill Abbott

These are such moral qualities as, when a man does not possess them, he is not bound to acquire them. They are: the moral feeling, conscience, love of one's neighbour, and respect for ourselves (self-esteem). There is no obligation to have these, since they are subjective conditions of susceptibility for the notion of duty, not objective conditions of morality.