Waste is worse than loss. The time is coming when every person who lays claim to ability will keep the question of waste before him constantly. The scope of thrift is limitless.

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 do not believe any type of religion should ever be introduced into the public schools of the United States.

Nearly every man who develops an idea works it up to the point where it looks impossible, and then he gets discouraged. That's not the place to become discouraged.

I am proud of the fact that I never invented weapons to kill.

I did not fail two thousand times. I merely found two thousand ways not to make a lightbulb.

If there is a better solution... find it.