Man... knows only when he is satisfied and when he suffers, and only his sufferings and his satisfactions instruct him concerning himself, teach him what to seek and what to avoid. For the rest, man is a confused creature; he knows not whence he comes or whither he goes, he knows little of the world, and above all, he knows little of himself.
Johann Wolfgang von GoetheThe man who masters himself is delivered from the force that binds all creatures.
Johann Wolfgang von GoetheIt is a great pleasure to transport one's-self into the spirit of the times; to see how a wise man has thought before us, and to what a glorious height we have at last carried it.
Johann Wolfgang von Goethe