“A well-informed mind is the best security against the contagion of folly and of vice. The vacant mind is ever on the watch for relief, and ready to plunge into error, to escape from the languor of idleness.”
—Ann Radcliffe,
The Mysteries of Udolpho, 1764

“It is the mark of an educated mind to be able to entertain a thought without accepting it.”
—Aristotle (384 BC–322 BC)

“Education: that which reveals to the wise, and conceals from the stupid, the vast limits of their knowledge.”
—Mark Twain (1835–1910)

“Education is what survives when what has been learned has been forgotten.”
—B. F. Skinner (1904–1990),
New Scientist, May 21, 1964