Nationalism is the measels of mankind.

The analogy I like is this imagine being able to see the world but you are deaf, and then suddenly someone gives you the ability to hear things as well - you get an extra dimension of perception.

Violence sometimes may have cleared away obstructions quickly, but it never has proved itself creative.

The real problem is in the hearts and minds of men. It is not a problem of physics but of ethics. It is easier to denature plutonium than to denature the evil spirit of man.

Truth is what stands the test of experience.

The most practical solution is a good theory.

There is, however, one other human right which is infrequently mentioned but which seems to be destined to become very important: this is the right, or the duty, of the individual to abstain from cooperating in activities which he considers wrong or pernicious.