We can agree wholeheartedly with this statement, as it would be hard to conceive of a more scheming and manipulative character than Iago. He excels at working upon other people's minds, to their ruin and to his own advantage. He implies and insinuates, puts ideas into people's heads, working upon their strongest emotions and desires and then stands by to watch the results. The most notable instance of this is, of course, Othello himself. Iago manages to twist Othello's great virtue of passionate and steadfast love towards one woman, Desdemona, round to the most bitter jealousy, which ulitmately leads to sheer tragedy. He torments Othello by distorting Desdemona's virtues of friendliness and consideration for others to make it appear as though she is too free and easy with Cassio and is actually having an affair with him. Iago's supreme art is in playing upon other people's virtues in order to achieve negative ends.