It doesn't matter if you try and try and try again, and fail. It does matter if you try and fail, and fail to try again.
A research problem is not solved by apparatus; it is solved in a man's head.
High achievement always takes place in the framework of high expectation.
It is the 'follow through' that makes the great difference between ultimate success and failure, because it is so easy to stop.
People see the wrongness in an idea much quicker that the rightness.
If you want to kill any idea in the world, get a committee working on it.