by 
Shakespeare was a genius. He was also a neologist; a creator of phrases (and even words).
And the list of these, that have entered common usage, is staggeringly long.
Selected Phrases
Bated breath - The Merchant of Venice
Be-all and end-all - Macbeth
Brave new world - The Tempest
Break the ice - The Taming of the Shrew
Cold comfort - The Taming of the Shrew
Dead as a doornail - Henry VI: Part II
Eaten me out of house and home - Henry IV: Part II
Faint hearted - Henry VI: Part I
Fancy free - A Midsummer Night's Dream
For goodness sake - Henry VIII
Forgone conclusion - Othello
Heart of gold - Henry V
In my mind's eye - Hamlet
It's Greek to me - Julius Caesar
Jealousy is the green-eyed monster - Othello
Kill with kindness - The Taming of the Shrew
Laughing stock - The Merry Wives of Windsor
Lie low - Much Ado About Nothing
Love is blind - The Merchant of Venice
One fell swoop - Macbeth
Play fast and loose - King John
Pure as the driven snow - Hamlet
Refuse to budge an inch - Measure for Measure
Set my teeth on edge - Henry IV: Part I
Wear my heart upon my sleeve - Othello
Wild goose chase - Romeo and Juliet
You can have too much of a good thing - As You Like It
You've got to be cruel to be kind - Hamlet
