The world's greatest thinkers have often been amateurs; for high thinking is the outcome of fine and independent living, and for that a professional chair offers no special opportunities.

Philosophy is a purely personal matter. A genuine philosopher's credo is the outcome of a single complex personality; it cannot be transferred. No two persons, if sincere, can have the same philosophy.

Dreams are real as long as they last. Can we say more of life?

The relation of the individual person to the species he belongs to is the most intimate of all relations.

No faith is our own that we have not arduously won.

All progress in literary style lies in the heroic resolve to cast aside accretions and exuberances, all the conventions of a past age that were once beautiful because alive and are now false because dead.

Even the most scientific investigator in science, the most thoroughgoing Positivist, cannot dispense with fiction; he must at least make use of categories, and they are already fictions, analogical fictions, or labels, which give us the same pleasure as children receive when they are told the "name" of a thing.