I know you cant highlight but you can type the phrase and ill highlight it Here, catch this casket. It is worth the pains.
I am glad ’tis night, you do not look on me,
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For I am much ashamed of my exchange.
But love is blind, and lovers cannot see
The pretty follies that themselves commit,
For if they could Cupid himself would blush
To see me thus transformèd to a boy.

Highlight the phrase that is an idiom in the above passage.