a cord of chords

That which is right and durably profitable is hard or by chance. Of chance nothing need nor usefully can be said. Of what is hard, then: most such is not both right and durably profitable; much is neither. So we hazard, do without, or discern amongst difficulties. This discernment of right profit is by iteration, inversion and study. That is our prime work; it is wisdom. Upon it, our second and third work: accordingly to serve and so to build.