ectypal.net

At this point it is important to note that this activity of the Holy Spirit with respect to Christ’s human nature absolutely does not stand by itself. Though it began with the conception, it did not stop there. It continued throughout his entire life, even right into the state of exaltation. Generally speaking, the necessity of this activity can be inferred already from the fact that the Holy Spirit is the author of all creaturely life and specifically of the religious-ethical life in humans. The true human who bears God’s image is inconceivable even for a moment without the indwelling of the Holy Spirit. In addition, in Christ the human nature had to be prepared for union with the person of the Son, that is, to a union and communion with God as that to which no other creature had ever been dignified. If humans in general cannot have communion with God except by the Holy Spirit, then this applies even more powerfully to Christ’s human nature, which had to be unified with the Son in an entirely unique manner.