What are some examples of conflict in Othello as supported by specific quotes?

Conflict in literature involves a struggle between opposing forces, such as between
aand an . Such conflict is external, but conflict can also be internal, as when a character
struggles to come to terms about whether to commit an act or not. External conflict may even
exist between a character and his or her circumstances, the weather conditions, and so
forth.

The play exhibits many examples of both external and internal
conflict. The first of these is displayed in Act 1, Scene 1, where there exists an apparent
conflict between what Iago wants and whathas decided. The general's agent is apparently bitter
that Othello has appointed a foreigner, Cassio, as his lieutenant instead of choosing him, a
loyal, long-serving, and experienced soldier. Iago is enraged and promises to avenge the
humiliation Othello has served upon him. Othello is, of course, blithely unaware of his
ancient's resentment and wholly trusts him. Iago, however, has made his intentions clear
to...