The price one pays for pursuing any profession, or calling, is an intimate knowledge of its ugly side.

Parents are usually more careful to bestow knowledge on their children rather than virtue, the art of speaking well rather than doing well but their manners should be of the greatest concern.

He that hath knowledge spareth his words.

To act on the belief that we possess the knowledge and the power which enable us to shape the processes of society entirely to our liking, knowledge which in fact we do not possess, is likely to make us do much harm.

Some people drink from the fountain of knowledge, others just gargle.