Youth is full of sport, age's breath is short; youth is nimble, age is lame; Youth is hot and bold, age is weak and cold; Youth is wild, and age is tame.
Once we have found ourselves, we must understand how from time to time to lose--and then to find--ourselves once again: assuming,that is, that we are thinkers. For a thinker it is a drawback to be bound to a single person all the time.
My glass shall not persuade me I am old, So long as youth and thou are of one date; But when in thee time's furrows I behold, Then look I death my days should expiate.