The idea of a world commonweal has to be established as the criterion of political institutions, and also as the criterion of general conduct in hundreds of millions of brains. It has to dominate education everywhere in the world. When that end is achieved, then the world state will be achieved.

The German people are an orderly, vain, deeply sentimental and rather insensitive people. They seem to feel at their best when they are singing in chorus, saluting or obeying orders.

Man ... can go up against gravitation in a balloon, and why should he not hope that ultimately he may be able to stop or accelerate his drift along the Time-Dimension, or even turn about and travel the other way.

The true objection to slavery is not that it is unjust to the inferior but that it corrupts the superior.

Nothing remains interesting where anything may happen.

The third peculiarity of aerial warfare was that it was at once enormously destructive and entirely indecisive.

There's nothing wrong in suffering, if you suffer for a purpose. Our revolution didn't abolish danger or death. It simply made danger and death worthwhile.