“…no one learns to know the Father except the Son, and no one learns to know the Son except the Father and him to whom He chooses to reveal Him (Mt 11:27). These are the Lord’s words. The Father and the Son reveal this to certain persons then, to those to whom they will, to those to whom they make it known, that is, to whom they impart the Holy Spirit, who is the common knowing or the common will of both. Those therefore to whom the Father and the Son reveal themselves recognize them as the Father and the Son recognize themselves, because they have within themselves their mutual knowing, because they have within themselves the unity of both, and their will or love: all that the Holy Spirit is.”
William of Saint-Thierry
Isn't it a fascinating thought that the Holy Spirit would constitute the "common knowing" and "common will" of the Father and the Son; that He is their internal means of recognizing each other fully; their mutual knowing of each other; the spiritual mechanism of their unity, will and love?
I think I'd like a fuller indwelling of that Spirit!