Our power of choice is untrammelled and when nothing prevents our being able to do what we like best every pleasure is to be welcomed and every pain avoided. But in certain circumstances and owing to the claims of duty or the obligations of business it will frequently occur that pleasures have to be repudiated and annoyances accepted. The wise man therefore always holds in these matters to this principle of selection: he rejects pleasures to secure other greater pleasures or else he endures pains to avoid worse pains. But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system and expound the actual teachings of the great explorer of the truth, the master-builder of human happiness.