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cf., Sent.I.D10.Q1.A4, SCG4.C19, CT.BookI.C46-47
In the next question, St. Thomas finishes by speaking about the Holy Spirit, first, about the name Holy Spirit (and a related controversy), second, about the name Love, and, third, about the name Gift.
As to the first, St. Thomas begins by discussing the name itself, second, he discusses the origination of the Holy Spirit.
As to the name, it is important to note, as he does in the beginning, that the terminus of the procession of love does not have a name among creatures. When we know some thing, a concept is clearly produced, yet, what is that which is produced by our love? There is no name for it, it can be described as an "interior weight," "an interior push," etc., but Sacred Scripture prefers to call it "Holy Spirit."