Echoes through time: the stages of life

There are three things which the gentleman guards against. In youth, when the physical powers are not yet settled, he guards against lust. When he is strong and the physical powers are full of vigour, he guards against quarrelsomeness. When he is old, and the animal powers are decayed, he guards against covetousness.

Confucius (551-479 BC), The Analects, Book XVI, para. 19