Epictetus

But God hath introduced Man to be a spectator of Himself and of His works; and not a spectator only, but also an interpreter of them. Wherefore it is a shame for man to begin and to leave off where the brutes do. Rather he should begin there, and leave off where Nature leaves off in us: and that is at contemplation, and understanding, and a manner of life that is in harmony with herself. See then that ye die not without being spectators of these things. (13)