A conviction akin to religious feeling of the rationality or intelligibility of the world lies behind all scientific work of a high order.

We [Jews] have no other means of self-defense than our solidarity

Desire for approval and recognition is a healthy motive, but the desire to be acknowledged as better, stronger, or more intelligent than a fellow being or fellow scholar easily leads to an excessively egoistic psychological adjustment, which may become injurious for the individual and for the community.

Go out as far as you can go and start from there

You can move through life seeing nothing as a miracle, or seeing everything as a miracle.

Concern for man and his fate must always form the chief interest of all technical endeavors. Never forget this in the midst of your diagrams and equations.

People love chopping wood. In this activity one immediately sees results.