When natural inclination develops into a passionate desire, one advances towards his goal in seven-league boots.

Nature may reach the same result in many ways.

So we find that the three possible solutions of the great problem of increasing human energy are answered by the three words: food, peace, work... Their scientific meaning and purpose now clear to me: food to increase the mass, peace to diminish the retarding force, and work to increase the force accelerating human movement.

A century from now it will no more occur to a normal person to mate with a person eugenically unfit than to marry a habitual criminal.

Be alone, that is the secret of invention; be alone, that is when ideas are born.

Within a few years a simple and inexpensive device, readily carried about, will enable one to receive on land or sea the principal news, to hear a speech, a lecture, a song or play of a musical instrument, conveyed from any other region of the globe.

The day when we shall know exactly what electricity is will chronicle an event probably greater, more important than any other recorded in the history of the human race. The time will come when the comfort, the very existence, perhaps, of man will depend upon that wonderful agent.