without reference.......................

13.  As surgeons keep their lancets and scalpels always at hand for the sudden demands of their craft, so keep your principles constantly in readiness for the understanding of things both human and divine;  never in the most trivial action forgetting how intimately the two are related.  For nothing human can be done aright without reference to the divine, and conversely.

-Marcus Aurelius,  Meditations, Book III