"Do not go to bed until you have gone over the day three times in your mind. What wrong did I do? What good did I accomplish? What did I forget to do?"

"The souls of animals called unreasoning are reasonable, not however with active reasoning powers, because of an imperfect mixture of the bodies and because they do not have the power of speech, as in …"

"Do not speak a little on many subjects, but much on a few."

"Every man has been made by God in order to acquire knowledge and contemplate."

"Concern should drive us into action and not into a depression."