Put your hand on a hot stove for a minute and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute.
To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.
There comes a time when the mind takes a higher plane of knowledge but can never prove how it got there.
I think and think for months and years. Ninety-nine times, the conclusion is false. The hundredth time I am right.