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.

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

To invent, you need a good imagination and a pile of junk.

To have a great idea, have a lot of them.

They say President Wilson has blundered. Perhaps he has, but I notice he usually blunders forward.

There will one day spring from the brain of science a machine or force so fearful in its potentialities, so absolutely terrifying, that even man, the fighter, who will dare torture and death in order to inflict torture and death, will be appalled, and so abandon war forever.

There is no substitute for hard work.

Results! Why, man, I have gotten a lot of results. I know several thousand things that won't work.

Religion is all bunk.

There is no expedient to which a man will not go to avoid the labor of thinking.

Restlessness is discontent and discontent is the first necessity of progress. Show me a thoroughly satisfied man and I will show you a failure.

The best thinking has been done in solitude. The worst has been done in turmoil.

The chief function of the body is to carry the brain around.

The reason a lot of people do not recognize opportunity is because it usually goes around wearing overalls looking like hard work.

The three great essentials to achieve anything worth while are: Hard work, Stick-to-itiveness, and Common sense.