"I'll not meddle with it; it is a dangerous thing; it makes a man a coward; a man cannot steal, but it accuseth him; a man cannot swear, but it checks him; a man cannot lie with his neighbor's wife, but it detects him. 'Tis a blushing, shame -faced spirit, that mutinies in a man's bosom ; it fills one full of obstacles; it made me once restore a purse of gold that by chance I found; it beggars any man that keeps it; it is turned out of all towns and cities for a dangerous thing; and every man that means to live well endeavors to trust to himself and live without it."

Source: King Richard III. King Henry VIII. Troilus and Cressida. Timon of Athens. Coriolanus.