It is the theory that decides what can be observed.

What a deep faith in the rationality of the structure of the world and what a longing to understand even a small glimpse of the reason revealed in the world there must have been in Kepler and Newton to enable them to unravel the mechanism of the heavens in long years of lonely work!

I am content in my later years. I have kept my good humor and take neither myself nor the next person seriously.

Only a monomaniac gets anything done.

You accept the historical Jesus?

The scientist is activated by a wonder and awe before the mysterious comprehensibility of the universe which is yet finally beyond his grasp. In its profoundest depths it is inaccessible to man.

Life is sacred, that is to say, it is the supreme value, to which all other values are subordinate.