This monologue is spoken in the play "Hamlet" by William Shakespeare. The words are being said by Prince Hamlet to Rosencrantz and Guildenstern in Act II, Scene 2. The quote in straight prose is:

"What a piece of work is man, How noble in reason, how infinite in faculty, In form and moving how express and admirable, In action how like an Angel, In apprehension how like a god, The beauty of the world, The paragon of animals. And yet to me, what is this quintessence of dust? Man delights not me; no, nor Woman neither; though by your smiling you seem to say so."

Here, Hamlet is telling us that although humans may appear to think and act "nobly" they are really nothing but "dust". He is expressing some melancholy thoughts. He is directly telling his friends about the difference between what man is and what man aspires to be. He is talking about how men actually behave; there is a great divide in all men, and this divide really depresses him.

History again and again shows us that men are corrupt and base. They appear to act unselfishly only in literature when moved by emotions, personal interests, circumstances, and others.

More Info: en.wikipedia.org