The strength of the Constitution, lies in the will of the people to defend it.

Show me a completely contented person and I'll show you a failure.

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

Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.

I make more mistakes than anyone else I know, and sooner or later, I patent most of them.

When there's no experimenting there's no progress. Stop experimenting and you go backward. If anything goes wrong, experiment until you get to the very bottom of the trouble.

The injurious agent in cigarettes comes principally from the burning paper wrapper. The substance thereby formed is called "acrolein." It has a violent action on the nerve centers, producing degeneration of the cells of the brain, which is quite rapid among boys. Unlike most narcotics, this degeneration is permanent and uncontrollable. I employ no person who smokes cigarettes.