I've been reading and meditating on this work by St. Thomas. It's full of principles that apply to our times. He's such a lucid and gifted teacher. We should thank God for him every day, and read him every day. Why waste the gift of God?

I have a hunch that this particular treatise can serve as a cypher key to crack open the symbolic meaning of the new motto: In illo uno unum.

Here is the link to read it online:

https://isidore.co/aquinas/english/DeRegno.htm

DE REGNO: ON KINGSHIP, TO THE KING OF CYPRUS

by
Thomas Aquinas

translated by
Gerald B. Phelan,
revised by
I. Th. Eschmann, O.P.

Toronto: The Pontifical Institute of Mediaeval Studies, 1949
Re-edited and chapter numbers aligned with Latin, by Joseph Kenny, O.P.