In the opening scene, Roderigo has given money to Iago so that Iago can try to win over Desdemona. Roderigo does not want Othello to marry Desdemona.
That thou, Iago, who hast had my purse As if the strings were thine, shouldst know of this.
'Sblood, but you'll not hear me. If ever I did dream of such a matter, abhor me.
Iago, Roderigo, and Barbantion are all having a discussion about their apparent hatred for Othello. This is the first time that these men express their bitterness toward Othello. Iago says a famous line: "I am not what I am." He means that he is not a bad man and he would be a suitor for Desdemona.
But I will wear my heart upon my sleeve. For daws to peck at: I am not what I am.
What a full fortune does the thicklips owe? If he can carry't thus.
Iago, Othello, and Cassio are seen arguing in this scene. Iago is making the case that because Othello is black, he should not marry Desdemona. Othello argues that he loves her and she loves him.
For know, Iago, But that I love the gentle Desdemona
Those are the raised father and his friends, You were best go in.
To prison, till fit time. Of law, and course of direct session. Call the to answer.
How may the duke be therewith satisfied, Whose messengers are here about my side.
Barbantio thinks that the Duke's messenger is here to take Othello to prison for his actions. Yet they are present for army business that the Duke has ordered Othello to attend.
The truth comes out about Othello and Barbantio's relationship. Barbantio, the father of Desdemona, loved Othello and acted like a father to him. Now the Duke knows the truth and has to decide what to do with Barbantio.
Say it, Othello.
Her father loved me, oft invited me, Still questioned me the story of my life.
Iago is now planning to reveal his plot against Othello, to Roderigo. Roderigo is the first person Iago tells the plan to.