Riches are held in esteem, but may be enjoyed by the worst as well as the best of men; Glory is a thing deserving of respect, but unstable; Beauty is a prize that men fight to obtain, but, once obtained, is of little continuance; Health is precious, but easily impaired; Strength is a thing desirable, but apt to be the prey of disease and old age. (And, in general, let any man who values himself upon strength of body know that he makes a great mistake; for what indeed is any proportion of human strength compared to that of other animals, such as elephants and bulls and lions?)

But learning alone, of all things in our possession, is immortal and divine. For reason alone grows youthful by age; and time, which decays all other things before it carries them away with it, leaves learning alone behind.

Pseudo-Plutarch, De liberis educandis ยป