The most practical solution is a good theory.

To invent something, all you need is imagination and a big pile of junk.

If I had an hour to solve a problem and my life depended on the solution, I would spend the first 55 minutes determining the proper question to ask, for once I know the proper question, I could solve the problem in less than five minutes.

It seems to me an utterly futile task to prescribe rules and limitations for the conduct of war. War is not a game; hence one cannot wage war by rules as one would in playing games. Our fight must be against war itself. The masses of people can most effectively fight the institution of war by establishing an organization for the absolute refusal of military service.

The aim (of education) must be the training of independently acting and thinking individuals who, however, see in the service to the community their highest life problem.

All religions, arts and sciences are branches of the same tree.

This has been done elegantly by Minkowski; but chalk is cheaper than grey matter, and we will do it as it comes.