More on Ugly as Sin from Infoplease:

• Ugly as Sin - Ugly as Sin Sin is a creature of such hideous mien That to be hated needs but to be seen. Pope. ...
• Beautiful - Beautiful Beautiful or fair as an angel. Throughout the Middle Ages it was common to associate ...
• Dictionary of Phrase and Fable: U - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "U"