God is subtle but he is not malicious.

Anyone can be a genius, if they pick just one specific subject and study it diligently just 15 minutes each day.

It is a miracle that curiosity survives formal 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.

The only justifiable purpose of political institutions is to ensure the unhindered development of the individual.

A knowledge of the existence of something we cannot penetrate, of the manifestations of the profoundest reason and the most radiant beauty - it is this knowledge and this emotion that constitute the truly religious attitude; in this sense, and in this alone, I am a deeply religious man.

If the bees disappear, man would have only four years of life left.