Shall we their fond pageant see?
Lord, what fools these mortals be!

Only a fool is astonished by the foolishness of mankind.

The common curse of mankind, -- folly and ignorance.

As a vessel is known by the sound, whether it be cracked or not; so men are proved, by their speeches, whether thy be wise or foolish

All the world's a stage, and all the men and women merely players.

What, man, defy the devil. Consider, he's an enemy to mankind.