Q3

Q3A6: This made me consider Christ's command towards evangelization & catechesis, "teaching them to observe all that I have commanded you" (Matt 28:20).  If God can have nothing that is not absolutely essential, what does that imply about His teaching to us?

Q3A7: Simplex helps here as modern usage of simple tends to the derogatory.  From a non-composite standpoint though, it had never occurred to me previously the immense importance of prime numbers in relation to nearly all areas of mathematics.  Even the complex is rooted in the simplex.

Q3A8: St. Thomas posits "it is not possible for God to enter into the composition of anything, either as a formal or a material principle".  It makes more sense to me if principium is translated here as source, as otherwise one might see that as contradicting e.g. the reality of the Eucharist (with the popular phrasing of "changing").