While a people preserves its language; it preserves the marks of liberty.

To doubt God is to doubt one's own conscience, and in consequence it would be to doubt everything.

Genius has no country. It blossoms everywhere. Genius is like the light, the air. It is the heritage of all.

Necessity is the most powerful divinity the world knows – it is the result of physical forces set in operation by ethical forces.

I do not write for this generation. I am writing for other ages. If this could read me, they would burn my books, the work of my whole life. On the other hand, the generation which interprets these writings will be an educated generation; they will understand me and say: Not all were asleep in the nighttime of our grandparents.

Man works for an object. Remove that object and you reduce him into inaction.

Dying people don't need medicine, the ones who remain do.