William Shakespeare

Life is a 'tale told by an idiot, full of sound and fury, signifying nothing.

And all our yesterdays have lighted fools The way to dusty death. Out, out, brief candle! Life's but a walking shadow, a poor player That struts and frets his hour upon the stage And then is heard no more: it is a tale Told by an idiot, full of sound and fury, Signifying nothing.

A fool thinks himself to be wise, but a wise man knows himself to be a fool.