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

"Though free to think and act, we are held together, like the stars in the firmament, with ties inseparable. These ties cannot be seen, but we can feel them. I cut myself in the finger, and it pains me…"

"The spread of civilization may be likened to a fire; first, a feeble spark, next a flickering flame, then a mighty blaze, ever increasing in speed and power."

"I have perfected a machine which will make it possible to transmit energy without wires to any point on the globe."

"What one man calls God, another calls the laws of physics."