For all men live by truth, and stand in need of expression. In love, in art, in avarice, in politics, in labor, in games, we study to utter our painful secret. The man is only half himself, the other half is his expression.

We are by nature observers, and thereby learners. That is our permanent state.

All the fairy tales of Aladdin, or the invisible Gyges, or the talisman that opens kings' palaces, or the enchanted halls underground or in the sea, are only fictions to indicated the one miracle of intellectual enlargement.

There is, in all great poets, a wisdom of humanity which is superior to any talents they exercise.

Build a better mousetrap and the world will beat a path to your door.

The Yankee is one who, if he once gets his teeth set on a thing, all creation can't make him let go.

Knowledge is the only elegance.