The world is so full of simpletons and madmen, that one need not seek them in a madhouse.
Time is a strange thing. It is a whimsical tyrant, which in every century has a different face for all that one says and does.
What you can do, or think you can, begin it.
Be above it! Make the world serve your purpose, but do not serve it.
When you lose interest in anything, you also lose the memory for it.
What is not fully understood is not possessed.