So you must not think a man has lived long because he has white hair and wrinkles: he has not lived long, just existed long. For suppose you should think that a man had had a long voyage who had been caught in a raging storm as he left harbour, and carried hither and thither and driven round and round in a circle by the rage opposing winds. He did not have a long voyage, just a long tossing about.
Seneca, On the Shortness of Life
aging, productivity