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.

Not to engage in this pursuit of ideas is to live like ants instead of like men.

Philosophy is everybody's business.

Ultimately there can be no disagreement between history, science, philosophy, and theology. Where there is disagreement, there is either ignorance or error.

If your friend wishes to read your 'Plutarch's Lives,' 'Shakespeare,' or 'The Federalist Papers,' tell him gently but firmly, to buy a copy. You will lend him your car or your coat - but your books are as much a part of you as your head or your heart.

Aristotle uses a mother's love for her child as the prime example of love or friendship.

Ask others about themselves, at the same time, be on guard not to talk too much about yourself.