"The true life of a man consists in seeing things with the eyes of the spirit."

"Without knowing what I am and why I am here, it is impossible for me to live, and I cannot know that; therefore I cannot live."

"The most difficult thing is to love the world and not to despise it."

"What a man is depends on what he believes."

"Man lives consciously for himself, but is an unconscious instrument in the attainment of the historic, universal aims of humanity."