What do we learn in "Othello" about Suspicion and Envy?

Two of the main themes in "Othello" seem to be suspicion and envy, these factors combined lead to the downfall of not only Othello but also Iago. We learn how envy appears to destroy Othello; we see how Iago brings on this envy through the deception of Othello. Shakespeare constantly emphasizes and repeats the line, "Honest Iago" it creates such a feeling of frustration in the audience. Furthermore one can see how Iago's envy grows throughout the play due to the promotion of Cassio to lieutenant.
To explore the themes fully we must look at each character and the way they act toward others.…