The world is so full of possibilities that dogmatism is simply indecent.

I think and think for months and years. Ninety-nine times, the conclusion is false. The hundredth time I am right.

Condemnation before investigation is the highest form of ignorance.

A man must learn to understand the motives of human beings, their illusions, and their sufferings.

Great spirits have always encountered violent opposition from mediocre minds.

Relativity teaches us the connection between the different descriptions of one and the same reality.

Common sense invents and constructs no less than its own field than science does in its domain. It is, however, in the nature of common sense not to be aware of this situation.