Knowledge is true opinion.

A good decision is based on knowledge and not on numbers.

Knowledge becomes evil if the aim be not virtuous.

Entire ignorance is not so terrible or extreme an evil, and is far from being the greatest of all too much cleverness and too much learning, accompanied with ill bringing-up, are far more fatal.

The learning and knowledge that we have, is, at the most, but little compared with that of which we are ignorant.