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Whenever ideas fail, men invent words.

All of the biggest technological inventions created by man - the airplane, the automobile, the computer - says little about his intelligence, but speaks volumes about his laziness.

I do not think you can name many great inventions that have been made by married men.

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

We live at a time when man believes himself fabulously capable of creation, but he does not know what to create.

In England, an inventor is regarded almost as a crazy man, and in too many instances, invention ends in disappointment and poverty. In America, an inventor is honoured, help is forthcoming, and the exercise of ingenuity, the application of science to the work of man, is there the shortest road to wealth.

Man never had an idea - man will never have an idea, except those supplied to him by his surroundings. Every idea in the world that man has came to him by nature.

Man has made use of his intelligence, he invented stupidity.

I guess that's just the life of an inventor: what people do with your ideas takes you totally by surprise.