"The words 'Here you can find perfect peace' can be written only over the gates of a cemetery."

"The world is not a heap of atoms, but a system of monads."

"If you could blow the brain up to the size of a mill and walk about inside, you would not find consciousness."

"The actual world is the most beautiful, because it contains the greatest variety with the greatest order."

"It is a great evil to be in doubt about the most important things."