Success to the strongest, who are always, at last, the wisest and best.

A sect or party is an elegant incognito devised to save a man from the vexation of thinking.

Though we love goodness and not stealing, yet also we love freedom and not preaching.

As to methods, there may be a million and then some, but principles are few. The man who grasps principles can successfully select his own methods.

What if you do fail, and get fairly rolled in the dirt once or twice. Up again, you shall never be so afraid of a tumble.

By his machines man can dive and remain under water like a shark; can fly like a hawk in the air; can see atoms like a gnat; can see the system of the universe of Uriel, the angel of the sun; can carry whatever loads a ton of coal can lift; can knock down cities with his fist of gunpowder; can recover the history of his race by the medals which the deluge, and every creature, civil or savage or brute, has involuntarily dropped of its existence; and divine the future possibility of the planet and its inhabitants by his perception of laws of nature.

The most dangerous thing is illusion.