I think and think for months and years. Ninety-nine times, the conclusion is false. The hundredth time I am right.
The fear of death is the most unjustified of all fears, for there's no risk of accident for someone who's dead.
As far as the laws of mathematics refer to reality, they are not certain, and as far as they are certain, they do not refer to reality.
Heroism on command, senseless violence, and all the loathsome nonsense that goes by the name of patriotism - how passionately I hate them!
That deep emotional conviction of the presence of a superior reasoning power, which is revealed in the incomprehensible universe, forms my idea of God.
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.