But in that crystal scales let there be weigh’d
Your lady’s love against some other maid
That I will show you shining at this feast,
And she shall scant show well that now shows best.
– William Shakespeare
Romeo and Juliet, Act 1, Scene 2. Benvolio uses a metaphor to compare Romeo’s eyes to the two sides of a balance scales. He promises that if Romeo should weighs his love for Rosaline against another beautiful woman Benvolio shows him at the feast, Rosaline will not compare as well.