Strenuous intellectual work and the study of God's Nature are the angels that will lead me through all the troubles of this life with consolation, strength, and uncompromising rigor.

If the facts don't fit the theory, change the facts.

I never teach my pupils, I only attempt to provide the conditions in which they can learn.

Everyone must become their own person, however frightful that may be.

History is littered with examples of men who would become gods, but only one example of God becoming Man.

The theory must not contradict empirical facts.

the scientist's religious feeling takes the form of a rapturous amazement at the harmony of natural law, which reveals an intelligence of such superiority that, compared with it, all the systematic thinking and acting of human beings is utterly insignificant reflection. This feeling is the guiding principle of his life and work, in so far as he succeeds in keeping himself from the shackles of selfish desire. It is beyond question closely akin to that which has possessed the religious geniuses of all ages.