To him who looks upon the world rationally, the world in its turn presents a rational aspect. The relation is mutual.
The hour of departure has arrived, and we go our ways. I to die, and you to live. Which is better God only knows.
Logic is like the sword–those who appeal to it shall perish by it.
You cannot conquer a free man. The most you can do is kill him.
Natural science does not simply describe and explain nature: it is part of the interplay between us and nature.
The educated differ from the uneducated as much as the living differ from the dead.
The intuitive mind is a sacred gift And the rational mind is a faithful servant.
Never memorize something that you can look up.
Education consists mainly of what we have unlearned.
If you are going through hell, keep going.