Wisdom is learning what to overlook.

Experience, as we know, has a way of boiling over, and making us correct our present formulas.

Life is one long struggle between conclusions based on abstract ways of conceiving cases, and opposite conclusions prompted by our instinctive perception of them.

To give the theory plenty of 'rope' and see if it hangs itself eventually is better tactics than to choke it off at the outset b abstract accusations of self-contradiction

An act has no ethical quality whatever unless it be chosen out of several all equally possible.

To consider hypotheses is surely always better than to dogmatize ins blaue hinein

There must always be a discrepncy between concepts and reality, because the former are static and discontinuous while the latter is dynamic and flowing