Decency, not to dare to do that in public which it is decent enough to do in private.
To know how to live is my trade and my art.
Off I go, rummaging about in books for sayings which please me.
He who does not live in some degree for others, hardly lives for himself.
What kind of truth is it which has these mountains as its boundary and is a lie beyond them?
To philosophize is to doubt.