Whether science-and indeed civilization in general-can long survive depends upon psychology, that is to say, it depends upon what human beings desire.

I consider the official Catholic attitude on divorce, birth control, and censorship exceedingly dangerous to mankind.

The legacy of Greece to Western philosophy is Western philosophy.

Americans need rest, but do not know it. I believe this to be a large part of the explanation of the crime wave in the United States.

Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.

Fundamental happiness depends more than anything else upon what may be called a friendly interest in persons and things.

No man can be a good teacher unless he has feelings of warm affection toward his pupils and a genuine desire to impart to them what he believes to be of value.