I remember that I was never able to get along at school. I was at the foot of the class.

The stomach is the only part of man which can be fully satisfied. The yearning of man's brain for new knowledge and experience and for more pleasant and comfortable surroundings never can be completely met. It is an appetite which cannot be appeased.

I have always consistently opposed high-tension and alternating systems of electric lighting...not only on account of danger, but because of their general unreliability and unsuitability for any general system of distribution.

Never be discouraged, because every wrong turn attempt, when left behind you, is another step forward taking you closer to your goals.

There is no limit to which a man will not go to avoid thinking.

Five percent of the people think; ten percent of the people think they think; and the other eighty-five percent would rather die than think.

An idea is something that won't work unless you do.