None of the miracles with which ancient histories are filled, occurred under scientific conditions. Observation never once contradicted, teaches us that miracles occur only in periods and countries in which they are believed in and before persons disposed to believe in them.

Every rebel is, with us, more or less a soldier who has missed his vocation, a being made for a heroic life ... The European race is a race of masters and soldiers. If you reduce this noble race to the work in a slave's prison like Negroes or Chinamen, it will rebel.

I can die when I wish to: that is my elixir of life.

A grain of sand leads to the fall of a mountain when the moment has come for the mountain to fall.

Good humor is a philosophic state of mind; it seems to say to nature that we take her no more seriously than she takes us.

It is through Christianity that Judaism has really conquered the world. Christianity is the masterpiece of Judaism.

Our opinions become fixed at the point where we stop thinking.