If people would only talk about what they understood, Earth would be a very quiet place.

All these constructions and the laws connecting them can be arrived at by the principle of looking for the mathematically simplest concepts and the link between them.

The individual who has experienced solitude will not easily become a victim of mass suggestion.

No problem is ever solved in the same consciousness thas was used to create it.

Condemnation before investigation is the highest form of ignorance.

The physicists say that I am a mathematician, and the mathematicians say that I am a physicist. I am a completely isolated man and though everybody knows me, there are very few people who really know me.

In the teaching of geography and history a sympathetic understanding (should) be fostered for the characteristics of the different peoples of the world, especially for those who we are in the habit of describing as "primitive.