If I be false, or swerve a hair from truth, When time is old and hath forgot itself, When waterdrops have worn the stones of Troy, And blind oblivion swallow'd cities up, And mighty states characterless are grated To dusty nothing, yet let memory, From false to false, among false maids in love, Upbraid my falsehood! when they've said 'as false As air, as water, wind, or sandy earth, As fox to lamb, as wolf to heifer's calf, Pard to the hind, or stepdame to her son,' 'Yea,' let them say, to stick the heart of falsehood, 'As false as Cressid.'
If I am unfaithful, or stray even a little from the truth, When I'm old and forget myself, When water has worn away the stones of Troy, And total forgetfulness has swallowed up cities, And great empires have crumbled to nothing, Let my memory still be cursed, If I'm false, among all the false women in love, Let them call me a liar! When they say, "She's as false As the air, as the water, the wind, or the sand, As a fox to a lamb, as a wolf to a calf, A leopard to a deer, or a stepmother to her son," "Yes," let them say, to truly mark my dishonesty, "She's as false as Cressid."
Cressida · Act 3, Scene 2
Cressida swears eternal fidelity with language so elaborate and cosmic that it seems impossible she could ever break it. The passage is unforgettable because it is her own curse spoken in advance—she is literally asking to be immortalized as the symbol of falsehood if she betrays Troilus. The irony is that she does exactly what she swears against, and her name becomes precisely what she dreaded, making her a prisoner of her own prophecy.