| Quote #1
For sir, it is as sure as you are Roderigo,
Iago is all about not revealing his true identity or intentions to anyone. Here, he tells Roderigo that he'll never allow his "outward action[s]" to show what's really going on inside of him because that would leave him vulnerable, kind of like allowing birds ("daws") to peck at his "heart." When Iago says "I am not what I am," he cryptically suggests that he's not what he appears to be. This phrase, we should point out, is an inversion of God's line, "I am what I am" (Exodus 3.14), which is in keeping with the play's alignment of Iago with the devil.
| Quote #2
It is too true an evil: gone she is;
When Brabantio learns that Desdemona has run off with Othello, he cries out, "Who would be a father!" and wonders "what's to come" of himself. Clearly, Brabantio feels as though his identity as a father and an authority figure have been compromised by Desdemona's elopement, which he interprets as "treason of the blood."
| Quote #3
At this point in the play, Othello is so secure in his value to the state of Venice that he says he does not care if Brabantio slanders him. Othello knows he's done nothing wrong in marrying Desdemona and that the Duke will support him, especially since Othello's a decorated war hero. What's interesting about this passage is how it reveals Othello's sense of himself as a military leader – his valuable "services" to the state of Venice have made him an "insider." At the same time, however, we know that Othello is also an "outsider" – he's a foreigner and his skin is black, which leaves him vulnerable to racist attitudes (like Brabantio's) in Venice.