"How many things are there of which I have gained a knowledge, not by the help of reason, but by experience!"

"Nothing is good but what is profitable."

"To love only what happens, what was spun for you. What could be more appropriate?"

"You have power over your mind - not outside events. Realize this, and you will find strength."

"It is in your power to withdraw yourself whenever you desire. Perfect tranquility is nothing more than the good ordering of the mind, the self-sufficiency which is within."