Don't trust your feelings, because no matter what they are now, they will soon have changed.
Have a good conscience and you will always have joy. If there is any joy in the world, it surely belongs to the person with a pure heart.
I have sought tranquility everywhere, and I have only found it sitting in a secluded corner, with a book in my hands.
If we were to eliminate one vice every year, we would soon become perfect.
If you think you know a lot and understand a lot, be certain that there is much more that you don't know.