In THE DOCTRINE OF THE NEW JERUSALEM CONCERNING THE LORD it has been shown that God is one in Person and in Essence, in Whom is a trinity, and that that God is the Lord; also that the Trinity in Him is called Father, Son and Holy Spirit, and that the Divine as Source (a quo) is named the Father, the Divine Human the Son, and the Divine Proceeding, the Holy Spirit. The Divine is called the Proceeding, and yet no-one knows the reason for its being called the Proceeding. It is not known for the reason that hitherto it has been unknown that the Lord appears before the angels as a Sun, from which Sun proceeds the heat which, in its essence, is the Divine Love, together with the light which, in its essence, is the Divine Wisdom. While these things were unknown, one could not know otherwise than that the Divine Proceeding was a Divine by itself. Therefore also it is stated in the Athanasian doctrine of the Trinity that there is one Person of the Father, another of the Son, and another of the Holy Spirit. Now, however, when it is known that the Lord appears as a Sun, a right idea may be had about the Divine Proceeding which is called the Holy Spirit, that it is one with the Lord but proceeds from Him as heat and light from a sun. And this is also the reason that angels are in Divine heat and Divine light to the extent in which they are in love and wisdom. Without the knowledge that the Lord appears in the spiritual world as a Sun, and that in this way His Divine proceeds, no-one can ever know what is understood by "to proceed", as whether it is merely to communicate those things which belong to the Father and the Soil, or merely to enlighten and teach. But still it is not from enlightened reason to acknowledge the Divine Proceeding as a Divine by itself, and to call it God, and so divide God when it has been known that God is One and that He is Omnipresent.