Nothing great in the world has ever been accomplished without passion.

Africa has no history and did not contribute to anything that mankind enjoyed.

To be independent of public opinion is the first formal condition of achieving anything great.

To him who looks upon the world rationally, the world in its turn presents a rational aspect. The relation is mutual.

Every idea, extended into infinity, becomes its own opposite.

An idea is always a generalization, and generalization is a property of thinking. To generalize means to think.

History teaches us that man learns nothing from history