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.

It seems that I have always been ahead of my time. I had to wait nineteen years before Niagara was harnessed by my system, fifteen years before the basic inventions for wireless which I gave to the world in 1893 were applied universally.

It is a mere question of time when men will succeed in attaching their machinery to the very wheelwork of nature.

It has cost me years of thought to arrive at certain results, by many believed to be unattainable, for which there are now numerous claimants, and the number of these is rapidly increasing, like that of the colonels in the South after the war.

Our entire biological system, the brain, and the Earth itself, work on the same frequencies.

Every effort under compulsion demands a sacrifice of energy. I never paid such a price.