The history of philosophy is not like the history of the sciences to be studied with the intellect alone. That which is receptive in us and that which impinges upon us from history is the reality of man's being unfolding itself in thought.
I began the study of medicine impelled by a desire for knowledge of facts...
But the wicked passions of men's hearts alone seem strong enough to leave...
If God did not exist it would be necessary to invent Him.
