Some of Shakespeare's famous quotations..

"All the world's a stage, and all the men and women merely players. They have their exits and their entrances, and one man in his time plays many parts, his acts being seven ages."
--From As You Like It (II, vii, 139-143)

"To be or not to be, that is the question: Whether 'tis nobler in the mind to suffer the slings and arrows of outrageous fortune or to take arms against a sea of troubles, and by opposing end them?"
--From Hamlet (III, i, 56-61)

O Romeo, Romeo! wherefore art thou Romeo?"
--From Romeo and Juliet (II, ii, 33)

(My personal favourite one)
Come night, come loving, black-browed night, give me my Romeo. And when I shall die, take him and cut him out in little stars and he will make the face of Heaven so fine, that all the world will be in love with night and pay no worship to the garish sun.
--From Romeo and Juliet

"Beware the ides of March."
--From Julius Caesar (I, ii, 33)

"A plague on both your houses!"
--From Romeo and Juliet (III, i, 94)

"If music be the food of love, play on; give me excess of it, that, surfeiting, the appetite may sicken, and so die."
--From Twelfth Night (I, i,1-3)

"All that glisters is not gold."
--From The Merchant of Venice (II, vii)

"Nothing can come of nothing: speak again."
--From King Lear (I, i, 92)

"I am constant as the northern star, of whose true-fix'd and resting quality. There is no fellow in the firmament."
--From Julius Caesar (III, i, 60 – 62)

"Let every eye negotiate for itself and trust no agent; for beauty is a witch against whose charms faith melteth in blood."
--From Much Ado About Nothing (II, i, 178-180)

"How poor are they that have not patience! What wound did ever heal but by degrees? Thou know'st we work by wit, and not by witchcraft; and wit depends on dilatory time."
--From Othello (II, iii, 376-379)

"O, how this spring of love resembleth the uncertain glory of an April day; which now shows all the beauty of the sun, and by and by a cloud takes all away."
--The Two Gentlemen of Verona (I, iii, 84-87)