It is the presence of doubt and the intensity of jealousy that becomes the elements that detail Othello's transformation in Act III. At the start of the Act, Othello seems to be enjoying all the elements of his ascension to power. The clown acts as a dutiful servant, Othello is going about his business as giving letters for Iago to deliver, and all is fine and all is good. Yet, when Cassio leaves the garden after speaking to Desdemona, Iago is able to plant his "poison" into Othello. From this, the physical signs of his transformation is evident. Othello complains of a headache, and looks fundamentally more stressed and ragged. The physical composure that was present in the previous scenes is not evident now, as Othello represents a force that wishes to destroy Cassio. At the same time, Othello is no longer tender towards Desdemona, but rather one who doubts and resents. His pushing her away when she is trying to massage his brow is something that would not have been part of his character previously. Yet, it is something that he does now because of his lack of trust, reflecting that his own personal sense of tenderness and compassion towards her is dissipating into a jealous rage.