If I seem happy to you... You could never say anything that would please me more. For men are made for happiness, and anyone who is completely happy has a right to say to himself, 'I am doing God's will on earth.' All the righteous, all the saints, all the holy martyrs were happy.
Book II, ch. 4 (trans. Constance Garnett). - The Brothers Karamazov (1879–1880)