One can state, without exaggeration, that the observation of and the search for similarities and differences are the basis of all human knowledge.

My dynamite will sooner lead to peace than a thousand world conventions. As soon as men will find that in one instant, whole armies can be utterly destroyed, they surely will abide by golden peace.

Hope is nature's veil for hiding truth's nakedness.

Second to agriculture, humbug is the biggest industry of our age.

Worry is the stomach's worst poison.

Contentment is the only real wealth.

Good wishes alone will not ensure peace.