What is my life if I am no longer useful to others.

Take care of your body with steadfast fidelity.

With the growth of knowledge our ideas must from time to time be organized afresh. The change takes place usually in accordance with new maxims as they arise, but it always remains provisional.

Our passions are the true phoenixes; when the old one is burnt out, a new one rises from its ashes.

You must be either the servant or the master, the hammer or the anvil.

People will allow their faults to be shown them; they will let themselves be punished for them; they will patiently endure many things because of them; they only become impatient when they have to lay them aside.

Who are you then?" "I am part of that power which eternally wills evil and eternally works good.