admiration is the daughter of ignorance

People often admire others about whom they only have incomplete knowledge: The president’s current popularity only proves the rule that admiration is the daughter of ignorance. This U.S. proverb was first recorded in 1733–58 by Benjamin Frank- lin in Poor Richard’s Almanack.
Proverb expressing similar meaning: what the eye doesn’t see, the heart doesn’t grieve over.
Proverb expressing opposite mean- ing: prejudice is the daughter of igno- rance.