Quotes from J. Arthur Thomson

The most powerful factors in the world are clear ideas in the minds of energetic men of good will.

The man who has grit enough to bring about the afforestation or the irrigation of a country is not less worthy of honor than its conqueror.

A prolonged war in which a nation takes part is bound to impoverish the breed, since the character of the breed depends on the men who are left.

There is no counting the unsolved problems of Natural History.

The most powerful factors in the world are clear ideas in the minds of energetic men of good will.