Ps. civ. 15. The term ἐπιούσιος has a spiritual import, inasmuch as the life of the body, supported by bread, is not all but should be subordinate to the spiritual life—the healthy body to be the instrument and vehicle of the healthy soul, for man’s real life (though he is not apt to think it such) is not dependent on bread alone—his whole existence is not material, though one side of it is. St. Ambrose, however, seems rather disposed to overlook the physical material bread (which we are certainly taught to pray for) for the sake of the supra-sensible Bread of Heaven and Food of Angels.