Some of them are:
"To be, or not to be: that is the question." (Hamlet)
"Neither a borrower nor a lender be; For loan oft loses both itself and friend, and borrowing dulls the edge of husbandry." (Hamlet)
"This above all: to thine own self be true". (Hamlet)
"The course of true love never did run smooth." (A Midsummer Night's Dream)
"What's in a name? That which we call a rose by any other name would smell as sweet." (Romeo and Juliet)
"A horse! a horse! my kingdom for a horse!" (Richard III)
"Double, double toil and trouble; Fire burn, and cauldron bubble." (Macbeth)
