With ideas it is like with dizzy heights you climb: At first they cause you discomfort and you are anxious to get down, distrustful of your own powers; but soon the remoteness of the turmoil of life and the inspiring influence of the altitude calm your blood; your step gets firm and sure and you begin to look - for dizzier heights.

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.

Love: I recognize the emotion for what it is, an irrational self-destructive impulse, which is disguised as joy.

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

I predict that very shortly the old-fashioned incandescent lamp, having a filament heated to brightness by the passage of electric current through it, will entirely disappear.

If you only knew the magnificence of the 3, 6 and 9, then you would have the key to the universe.

I could only achieve success in my life through self-discipline, and I applied it until my wish and my will became one.