For the subtlest folly proceeds from the subtlest wisdom.

The most exquisite Folly is made of Wisdom spun too fine.

Mingle a little folly with your wisdom; a little nonsense now and then is pleasant

The hours of folly are measur’d by the clock, but of wisdom: no clock can measure.

Wisdom excelleth folly, as far as light excelleth darkness.

Only fools befriend ignorance, and they pay the price. Only the wise befriend wisdom, and they reap the rewards. We are all ignorant of something, but some are ignorant of everything.