"Amir," said the Devil.
Devil: I did you a favour.
Devil: I want you to return the favour.
Me: But -
Devil: I would not ask you to do anything that runs counter to your sense of honour. In fact, for that, I will ask you to do two things that would not conflict with your sense of honour, justice or morality.
Me: And you are the devil.
Devil: That, I am. Have I, unlike so many others, pretended to be someone else?
Me: Your deals... always come with a catch.
Devil: Oh, it is no deal. I am not offering you anything you might want. In fact, I cannot give you what you want.
Devil: I am appealing, only to your nature. To always try to repay favours. To keep your word.
Me: You... believe in my word?
Devil: You have never lied.
Me: Very well. I promise that if I feel like it, I will do your two favours.
Devil: Good enough for me.