Origen Against Celsus Book VI " For it is the custom of Scripture to give to "intelligent beings" the names of "spirits" and "spiritual things," by way of distinction from those which are the objects of "sense; "as when Paul says, "But our sufficiency is of God; who hath also made us able ministers of the New Testament; not of the letter, but of the spirit; for the letter killeth, but the spirit giveth life,"[366]