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 GoetheFor the butterfly, mating and propagation involve the sacrifice of life, for the human being, the sacrifice of beauty.
Johann Wolfgang von GoetheThe field of experience is the whole universe in all directions. Theory remains shut up within the limits of human faculties.
Johann Wolfgang von Goethe