The authorities teach that next to the first emanation, which is the Son coming out of the Father, the angels are most like God. And it may well be true, for the soul at its highest is formed like God, but an angel gives a closer idea of Him. That is all an angel is: an idea of God. For this reason the angel was sent to the soul, so that the soul might be re-formed by it, to be the divine idea by which it was first conceived. Knowledge comes through likeness. And so because the soul may know everything, it is never at rest until it comes to the original idea, in which all things are one. And there it comes to rest in God.

Sermon 9, as translated in The Reading and Preaching of the Scriptures in the Worship of the Christian Church (1999) by Hughes Oliphant Old, Ch. 9: The German Mystics, p. 449