The progressive development of man is vitally dependent on invention.

Is nature a giant cat? If so, who strokes its back?

Of all the frictional resistances, the one that most retards human movement is ignorance.

The recurrence of a phenomenon like Edison is not very likely. The profound change of conditions and the ever increasing necessity of theoretical training would seem to make it impossible. He will occupy a unique and exalted position in the history of his native land, which might well be proud of his great genius and undying achievements in the interest of humanity.

The idea came like a flash of lightning and in an instant the truth was revealed.

So astounding are the facts in this connection, that it would seem as though the Creator, himself had electrically designed this planet.

I would not give my rotating field discovery for a thousand inventions, however valuable... A thousand years hence, the telephone and the motion picture camera may be obsolete, but the principle of the rotating magnetic field will remain a vital, living thing for all time to come.