Colossians 1:16

Thrones, &c. are commonly understood to refer to the celestial hierarchy of Angels, though as to their particular rank, &c. nothing certain is known. We may here observe, that the Holy Spirit proportions itself and speaks according to our ideas of a temporal kingdom, in which one authority is subject to another. In the same manner the Angels seem subordinate to one another. (St. Dionysius in Calmet) --- All things were created by him, and in him, and [3] consist in him. If all things that are were made by him, he himself was not made. And his divine power is also signified, when it is said all things consist or are preserved by him. (Witham)

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In ipso constant; Greek: en auto sunesteke. See St. John Chrysostom.