Oh right, Iago. Well, I always forget his name because the real Iago was such a total bastard (but fun to play.)

"Oh beware, my lord, of jealousy. It is the green-eyed monster which doth mock the meat it feeds on. That cuckold lives in bliss who, certain of his fate, loves not his wronger; but oh, what damned minutes tell o'er he who dotes- yet doubts; suspects- yet soundly loves!"