Confidence is a killer and it shows in William ShakeSpeare's play Julius Caesar, which in Julius Caesar is murder by his close companions because he is supposedly ambitious and this points out a flaw in Caesar which is his confidence, his close companions were so close to caesar that he had confidence in them and never suspected a thing thus it ended up being the cause of his death.

Confidence also shows up in Shakespeare’s Macbeth, which happened to be that when Macbeth was told he couldn’t be killed by man of women born he was overconfident about being invincible to those he faced until one day when the woods surrounding the castle marched on it and he engaged an enemy he did not know was not women born he died because of his overconfidence.