All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

Real knowledge is to know the extent of one's ignorance.

Discussion is an exchange of knowledge an argument an exchange of ignorance.

The aim of education is the knowledge not of facts but of values.

Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.

Knowledge of what is possible is the beginning of happiness.

It is the province of knowledge to speak, and it is the privilege of wisdom to listen.

Jealousy is all the fun you think they had.

If knowledge can create problems, it is not through ignorance that we can solve them.

Knowledge of what is does not open the door directly to what should be.