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.

Opinion is the medium between knowledge and ignorance.

Knowledge without justice ought to be called cunning rather than wisdom.

Knowledge which is acquired under compulsion obtains no hold on the mind.