There are genuine mysteries in the world that mark the limits of human knowing and thinking. Wisdom is fortified, not destroyed, by understanding its limitations. Ignorance does not make a fool as surely as self-deception.

I suspect that most of the individuals who have religious faith are content with blind faith. They feel no obligation to understand what they believe. They may even wish not to have their beliefs disturbed by thought.

Love can be unselfish, in the sense of being benevolent and generous, without being selfless.

The philosopher ought never to try to avoid the duty of making up his mind.

In English we must use adjectives to distinguish the different kinds of love for which the ancients had distinct names.

The purpose of learning is growth, and our minds, unlike our bodies, can continue growing as we continue to live.

Freedom is the emancipation from the arbitrary rule of other men.