... one does people the best service by giving them some elevating work to do and thus indirectly elevating them.

You do not really understand something unless you can explain it to your grandmother.

Reality is merely an illusion, albeit it a very persistent one.

The important thing is not to stop questioning. Curiosity has its own reason for existing. One cannot help but be in awe when he contemplates the mysteries of eternity, of life, of the marvelous structure of reality. It is enough if one tries merely to comprehend a little of this mystery every day. Never lose a holy curiosity.

Science without religion is lame, religion without science is blind.

Everything should be as simple as possible, but no simpler.

The State is made for man, not man for the State.

I don't know what will be used in the next world war, but the fourth will be fought with stones.

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. Therefore, the school and the teacher must guard against employing the easy method of creating individual ambition, in order to induce the pupils to diligent work ... The most important motive for work in the school and in life is the pleasure in work, pleasure in its result, and the knowledge of the value of the result to the community. In the awakening and strengthening of these psychological forces in the young man, I see the most important task given by the school.

The important thing is not to stop questioning.