JESSICA: But love is blind, and lovers cannot see
The pretty follies that themselves commit.

William Shakespeare (1564-1616) English dramatist and poet

Merchant of Venice, Act 2, sc. 6, l. 37ff (2.6.37-38) (1597)
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One of several times Shakespeare used the phrase, "Love is blind." He popularized it, but it was first used by Chaucer around 1404 in "The Merchant's Tale" ("For loue is blynd alday ...").