If we want to avert an impending calamity and a state of things which may transform this globe into an inferno, we should push the development of flying machines and wireless transmission of energy without an instant’s delay and with all the power and resources of the nation.

Years hence it will be possible for nations to fight without armies, ships or guns, by weapons far more terrible, to the destructive action and range of which there is virtually no limit. A city, at any distance whatsoever from the enemy, can be destroyed by him and no power on earth can stop him from doing so.

I am filled with conviction that the interests of humanity would be best served if the United States remained true to its traditions and kept out of “entangling alliances.

Our bodies are of such complexity of structure, the motions we perform are so numerous and involved, and the external impressions on our sense organs to such a degree delicate and elusive that it is hard for the average person to grasp this fact.

Soon became convinced I was right and undertook the task with all the fire and boundless confidence of youth.

The day science begins to study non-physical phenomena, it will make more progress in one decade than in all the previous centuries of its existence.

Invention is the most important product of man's creative brain. The ultimate purpose is the complete mastery of mind over the material world, the harnessing of human nature to human needs.

Life is and will ever remain an equation incapable of solution, but it contains certain known factors.

All of these years of my service towards mankind did not bring me nothing but assaults and humiliations.