Insofar as we may at all claim that slavery has been abolished today, we owe its abolition to the practical consequences of science

Our defense is not in our armaments, nor in science, nor in going underground. Our defense is in law and order.

All of us who are concerned for peace and triumph of reason and justice must be keenly aware how small an influence reason and honest good will exert upon events in the political field.

[Ernest Rutherford is]...a second Newton.

What physics looks for: The simplest possible system of thought which will bind together the observed facts.

The most important human endeavor is the striving for morality in our actions. Our inner balance and even our very existence depend on it. Only morality in our actions can give beauty and dignity to life. To make this a living force and bring it to clear consciousness is perhaps the foremost task of education. The foundation of morality should not be made dependent on myth nor tied to any authority lest doubt about the myth or about the legitimacy of the authority imperil the foundation of sound judgment and action.

If you cannot explain it simply, you do not understand it enough.