Everything that can be counted does not necessarily count; everything that counts cannot necessarily be counted.

I am a determinist. As such, I do not believe in free will. The Jews believe in free will. They believe that man shapes his own life. I reject that doctrine philosophically. In that respect I am not a Jew.

Science without religion is lame, religion without science is blind.

For an idea that does not first seem insane, there is no hope.

It is certainly true that principles cannot be more securely founded than on experience and consciously clear thinking.

I think 99 times and find nothing. I stop thinking, swim in the silence, and the truth comes to me.

To the Master's honor all must turn, each in its track, without a sound, forever tracing Newton's ground.