What is liberty? You say of the locomotive that it runs free. What do you mean? You mean that its parts are so assembled and adjusted that friction is reduced to a minimum, and that it has perfect adjustment. We say of a boat skimming the water with light foot, “How free she runs,” when we mean, how perfectly she is adjusted to the force of the wind, how perfectly she obeys the great breath out of the heavens that fills her sails. Throw her head up into the wind and see how she will halt and stagger, how every sheet will shiver and her whole frame will be shaken, how instantly she is “in irons,” in the expressive phrase of the sea. She is free only when you have let her fall off again and have recovered once more her nice adjustment to the forces she must obey and cannot defy.
Human freedom consists in perfect adjustments of human interests and human activities and human energies.