Life of God ambiguous: in Himself and in us; natural and spiritual
The life of God is said ambiguously: either that by which He Himself lives in Himself, or that by which He lives in us. Of the latter Paul speaks in Ephesians 4:18, saying the Gentiles are alienated from the life of God. Of which also Irenaeus, Against Heresies book V chapter 13: The life of man, he says, is twofold, natural and spiritual.
Natural is that life which we have through the first generation in Adam, and is nothing other than the function of the rational soul in moving, sensing, and reasoning; of this it is said in Acts 17:28, In Him we live and move and are. Spiritual is that life which we have through the second generation in Christ, and is nothing other than perfect motion from the action of the Holy Spirit, who is as it were the soul of the regenerate man: and this is that life which to the Ephesians is called the life of God, and in 2 Corinthians 4:11 the life of Jesus.
Not of this, but of that we chiefly treat here — namely that by which God lives in Himself, which is God Himself, and is conceived by us as the second moment of the divine nature. The material in this attribute also is the same as in the others, namely God's highest perfection; but the formal consists in the position of the most supereminent mode of spiritual life by which God is active in Himself and outside Himself.
Latin
Vita Dei ambigue dicitur, vel qua ipse vivit in se, vel qua vivit in nobis. De hac Paulus loquitur Ephes. IV.18, dicens gentes alienatas esse a vita Dei. De qua etiam Irenaeus lib. V. adversus haereses cap. XIII: Vita, inquit, hominis duplex est, naturalis et spiritualis. Naturalis est vita illa quam habemus per primam generationem in Adamo, nihilque aliud est quam functio animae rationalis in movendo, sentiendo, ratiocinando; de hac dicitur Act. XVII.28: Per ipsum vivimus, movemur et sumus. Vita spiritualis est illa quam habemus per secundam generationem in Christo, nihilque aliud est quam motus perfectus ab actione Spiritus sancti, qui hominis regenerati tanquam anima est: atque haec est illa vita quae ad Ephesios dicitur vita Dei, et II Cor. IV.11 vita Jesu. Non de hac, sed de illa hic potissimum agimus, qua videlicet Deus vivit in se, quae Deus ipse est, et a nobis concipitur tanquam secundum naturae divinae momentum. Materiale quidem etiam in hoc attributo idem est quod in aliis, summa nempe Dei perfectio; formale vero est in positione modi spiritualis vitae supereminentissimi, quo Deus in se et extra se actuosus est.