Think now and then that there is a man who would give his life, to keep a life you love beside you.

You should keep dogs-fine animals-sagacious.

It's not put into his head to be buried. It's put into his head to be made useful. You hold your life on the condition that to the last you shall struggle hard for it. Every man holds a discovery on the same terms.

There is nothing in the world so irresistibly contagious as laughter and good humor.

I admire machinery as much is any man, and am as thankful to it as any man can be for what it does for us. But it will never be a substitute for the face of a man, with his soul in it, encouraging another man to be brave and true.

"Then idiots talk," said Eugene, leaning back, folding his arms, smoking with his eyes shut, and speaking slightly through his nose, "of Energy. If there is a word in the dictionary under any letter from A to Z that I abominate, it is energy."

Eccentricities of genius.