In Thornton Wilder’s play The Skin of Our Teeth the character Mrs. Antrobus says to her spouse, ‘I didn’t marry you because you were perfect. I married you because you gave me a promise.’ She takes off her ring and looks at it. ‘That promise made up for your faults and the promise I gave you made up for mine. Two imperfect people got married, and it was the promise that made the marriage.”