Long live impudence. It was my guardian angel in this world.

My feeling is religious insofar as I am imbued with the consciousness of the insufficiency of the human mind to understand more deeply the harmony of the Universe which we try to formulate as "laws of nature".

The finest emotion of which we are capable is the mystic emotion.

I think and think for months and years. Ninety-nine times, the conclusion is false. The hundredth time I am right.

The Bible is a great source of wisdom and consolation and should be read frequently.

The most beautiful gift of nature is that it gives one pleasure to look around and try to comprehend what we see.

Whether or not you can observe a thing depends upon the theory you use. It is the theory which decides what can be observed.