This is from a conversation I had with a catholic convert. I was trying to get him to affirm the implications of absolute divine simplicity.
Because of all of that–because simplicity forces all terms in Thomas to act as a great metaphysical “=” sign–all acts in God are identical. Therefore, for him there is no difference between the Son eternally originating the spirit and eternally mediating the Spirit. That’s why Florence identified the two concepts–given their view of God the two were the same thing, because all acts in God are the same thing.