The tyrant custom, most grave senators,
Hath made the flinty and steel couch of war
My thrice-driven bed of down.
– William Shakespeare
Othello, Act 1, Scene 3. Othello, speaking here to the Duke, accepts his mission to lead the fight against the Turks. He uses metaphors to compare the hardships of war to a couch and bed of down, indicating that Othello is comfortable with war. Custom is personified as a tyrant.