Insanity is doing the same thing, over and over again, but expecting different results.

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.

Education is that which remains, if one has forgotten everything he learned in school.

Yet it is equally clear that knowledge of what is does not open the door directly to what should be.

The most beautiful experience we can have is the mysterious.

Strange is our situation here upon the earth. Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose.

I appeal to all men and women, whether they be eminent or humble, to declare that they will refuse to give any further assistance to war or the preparation of war.

Common sense is the collection of prejudices acquired by age eighteen.

Man has an intense desire for assured knowledge.

There are two ways to live your life. One is as though nothing is a miracle. The other way is as though everything is a miracle.