Books are the training weights of the mind.

Some things are in our control and others not. Things in our control are opinion, pursuit, desire, aversion, and, in a word, whatever are our own actions. Things not in our control are body, property, reputation, command, and, in one word, whatever are not our own actions.

When you want to hear a philosopher, do not say, 'You say nothing to me'; only show yourself worthy or fit to hear, and then you will see how you will move the speaker.

Think of God oftener than you breathe.

As in walking it is your great care not to run your foot upon a nail, or to tread awry, and strain your leg; so let it be in all the affairs of human life, not to hurt your mind or offend your judgment. And this rule, if observed carefully in all your deportment, will be a mighty security to you in your undertakings.

If anyone tells you that a certain person speaks ill of you, do not make excuses about what is said of you but answer, "He was ignorant of my other faults, else he would not have mentioned these alone.

Within our control are our own opinions, aspirations, and desires and the demons that distract us from these goals. Outside of our control are such things as what kind of body we have, whether or not we are born into wealth, and how we are regarded by others.