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

The materialist assumption that spiritual substances do not exist is as much an act of faith as the religious belief in the reality of angels.

If a book is easy and fits nicely into all your language conventions and thought forms, then you probably will not grow much from reading it. It may be entertaining, but not enlarging to your understanding. It’s the hard books that count. Raking is easy, but all you get is leaves; digging is hard, but you might find diamonds.

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.

Emancipation of human labor from economic servitude and exploitation, i.e., from organizations of production in which the conditions of work are determined by a master class who own the means of production, and in which the fruits of work are alienated from workers to the benefit of masters.

Philosophy is everybody's business.

The ultimate end of education is happiness or a good human life, a life enriched by the possession of every kind of good, by the enjoyment of every type of satisfaction.