There is no greater folly in the world than for a man to despair.
— Miguel de Cervantes

The folly of all follies is to be love sick for a shadow.
Alfred Lord Tennyson folly quote

But love is blind, and lovers cannot see What petty follies they themselves commit
— William Shakespeare

He who is slow to anger has great understanding, but he who has a hasty temper exalts folly.
— Proverbs

We are all full of weakness and errors; let us mutually pardon each other our follies it is the first law of nature.
— folly quotation by Voltaire