Thus do I ever make my fool my purse:
For I mine own gain’d knowledge should profane,
If I would time expend with such a snipe.
But for my sport and profit.
– William Shakespeare
Othello, Act 1, Scene 3. Soliloquies can reveal a lot about the character of the person who speaks them. In Iago’s first he sneeringly refers to Roderigo as a fool, having just convinced him to sell all his land, so Iago can further enrich himself. Using metaphors he compares Roderigo to "my purse" and "a snipe," admitting that he only spends time with this idiot to use him as a cash cow and for his amusement. Iago’s deceptive and treacherous nature is on full show here, as he manipulates Roderigo into handing over large sums of money, supposedly to purchase gifts for and win the affections of Desdemona, but instead it is pocketed by Iago.