I often say that research is a way of finding out what you are going to do when you can't keep on doing what you are doing now.

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.

There has never been any 30-hour week for men who had anything to do.

Keep on going and the chances are you will stumble on something, perhaps when you are least expecting it. I have never heard of anyone stumbling on something sitting down.

Modern psychology teaches that experience is not merely the best teacher, but the only possible teacher.. There is no war between theory and practice. The most valuable experience demands both, and the theory should supplement the practice and not precede it.

It is man's destiny to ponder on the riddle of existence and, as a byproduct of his wonderment, to create a new life on this earth.

People see the wrongness in an idea much quicker that the rightness.