Americans need rest, but do not know it. I believe this to be a large part of the explanation of the crime wave in the United States.

Many people when they fall in love look for a little haven of refuge from the world, where they can be sure of being admired when they are not admirable, and praised when they are not praiseworthy.

I think it would be just to say the most essential characteristic of mind is memory, using this word in its broadest sense to include every influence of past experience on present reactions.

Do not feel envious of the happiness of those who live in a fool's paradise, for only a fool will think that is happiness.

When it was first proposed to establish laboratories at Cambridge, Todhunter, the mathematician, objected that it was unnecessary for students to see experiments performed, since the results could be vouched for by their teachers, all of them of the highest character, and many of them clergymen of the Church of England.

To the primitive mind, everything is either friendly or hostile; but experience has shown that friendliness and hostility are not the conceptions by which the world is to be understood.

This idea of weapons of mass extermination is utterly horrible and is something which no one with one spark of humanity can tolerate.