He uses the metaphor of a garden and gardener to illustrate how one's body is their garden and they are their own gardener. Therefore, one has control of how successful they will be. Iago applies different vegetables to exhibit the difference between a prosperous and an ailing life. He then presents a more physiological view on how reason is the most important quality in maintaining an affluent life. He immediately rejects emotion and blames it. and it is necessary to have reason dominate emotion and control it especially when dealing with the themes of lust and love. Iago utilizes an easy topic of nature to decipher more complex physiological topics of emotion vs reason and love vs lust. However, ironically Iago's emotions dominate his decision making leading him to plot against the protagonist,