William Shakespeare, "Othello", Act 3 Scene 3

Excellent wretch! Perdition catch my soul,
But I do love thee! and when I love thee not,
Chaos is come again.

O, beware, my lord, of jealousy!
It is the green-eyed monster which doth mock
The meat it feeds on.

Speak to me as to thy thinkings,
As thou dost ruminate, and give thy worst of thoughts
The worst of words.