OTHELLO: [Kneels] Now, by yond marble heaven,
In the due reverence of a sacred vow
I here engage my words.
IAGO: Do not rise yet.
[Kneels] Witness, you ever-burning lights above,
You elements that clip us round about,
Witness that here Iago doth give up
The execution of his wit, hands, heart,
To wrong’d Othello’s service! Let him command,
And to obey shall be in me remorse,
What bloody business ever.
[They rise]
OTHELLO: I greet thy love,
Not with vain thanks, but with acceptance bounteous,
And will upon the instant put thee to ‘t.
Within these three days let me hear thee say
That Cassio’s not alive.
IAGO: My friend is dead; ’tis done at your request.
– William Shakespeare
Othello, Act 3, Scene 3. Iago and Othello kneel together and exchange vows of evil in a perverse mock marriage ceremony. Othello forsakes his wife, goes over to the dark side and makes a diabolical pact with Iago. This is a turning point in the play, as Othello submits to Iago and is now completely under his devilish power. Iago, having persuaded Othello of his innocent wife’s infidelity, pledges fealty to Othello. He promises to deliver on Othello’s request to murder the innocent Cassio. The "ever-burning lights above" is a metaphor for the stars, as Othello and Iago blasphemously address the heavens as if talking and praying to God, while declaring their "love" union based on evil and hatred. Othello has succumbed to Iago’s relentless manipulation and is now completely controlled by him. This passage represents the "marriage" of Othello and Iago. We have dramatic irony in Iago’s vow to serve Othello, when we know that Iago is simply serving himself.