If a donkey bray at you, don't bray at him.
Weening is not measure.
He that is not handsome at 20, nor strong at 30, nor rich at 40, nor wise at 50, will never be handsome, strong, rich or wise.
Who remove stones, bruise their fingers.
Castles are Forrests of stones.
When you are an Anvill, hold you still; when you are a hammer, strike your fill.