[3dly.] The execution of his office of mediation in his single person, in respect of both natures: wherein is considerable, ὁ ἐνεργῶν, — the agent, Christ himself, God and man. He is the principium quo, ἐνεργητικὸν, — the principle that gives life and efficacy to the whole work; and then, 2dly, The principium quod, — that which operates, which is both natures distinctly considered. 3dly. The ἐνέργεια, or δραστικὴ τῆς φύσεως κίνησις, — the effectual working itself of each nature. And, lastly, the ἐνέργημα, or ἀποτέλεσμα, — the effect produced, which ariseth from all, and relates to them all: so resolving the excellency I speak of into his personal union.