EDUCATION, n. That which discloses to the wise and disguises from the foolish their lack of understanding.

Ambrose Bierce (1842-1914?) American writer and journalist

“Education,” The Cynic’s Word Book (1906)
    (Source)

Included in The Devil's Dictionary (1911). Originally published in the "Devil's Dictionary" column in the San Francisco Wasp (1882-12-23).