Each time you fail, you have eliminated another wrong option.

The man who doesn’t make up his mind to cultivate the habit of thinking misses the greatest pleasure in life.

I love great music and art, but I think 'cubist' songs and paintings are hideous.

I have not failed. I've just found 10,000 ways that won't work.

The first requisite for success is to develop the ability to focus.

It is apparent to me that the possibilities of the aeroplane, which two or three years ago were thought to hold the solution to the [flying machine] problem, have been exhausted, and that we must turn elsewhere.

It is very different to make a practical system and to introduce it. A few experiments in the laboratory would prove the practicability of system long before it could be brought into general use. You can take a pipe and put a little coal in it, close it up, heat it and light the gas that comes out of the stem, but that is not introducing gas lighting. I'll bet that if it were discovered to-morrow in New York that gas could be made out of coal it would be at least five years before the system would be in general use.