Only morality in our actions can give beauty and dignity to life.

The wireless telegraph is not difficult to understand. The ordinary telegraph is like a very long cat. You pull the tail in New York, and it meows in Los Angeles. The wireless is the same, only without the cat.

The finest emotion of which we are capable is the mystic emotion. Herein lies the germ of all art and all true science. Anyone to whom this feeling is alien, who is no longer capable of wonderment and lives in a state of fear is a dead man.

It is a miracle that curiosity survives formal education.

I believe in intuitions and inspirations...I sometimes FEEL that I am right. I do not KNOW that I am.

If you can't explain what you are doing to a nine-year-old, then either you still don't understand it very well, or it's not all that worthwile in the first place.

I never made one of my discoveries through the process of rational thinking