De Deo Trino et Creatore

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[*Super Sent.* , lib. 1 d. 10 q. 1 a. 3 "Utrum spiritus sanctus sit unio patris et filii"](https://www.corpusthomisticum.org/snp1009.html#847) really helped my understand why we often conclude our prayers "… *in* unitáte *Spíritus Sancti. Amen.* ":> Possunt enim pater et filius considerari vel inquantum conveniunt in essentia, et sic uniuntur in essentia; vel inquantum distinguuntur in personis, et sic uniuntur per consonantiam amoris: quia et si per impossibile poneretur quod non essent unum per essentiam, ad perfectam jucunditatem oporteret in eis intelligi unionem amoris.Fr. Garrigou-Lagrange, O.P., shows the role of Trinity in Catholic intellectual life, intro. of [*De Deo Trino et Creatore*](https://isidore.co/calibre#panel=book_details&book_id=3085):> In the Trinity we see the infinite and eternal fecundity of the divine nature, which is communicated by the Father to the Son, and to the Holy Ghost by the Father and the Son. The Protestant theologians mentioned above say that the mystery of the Trinity is an enigma without meaning for our interior life, but the traditional theologians say that in this mystery of the Trinity we come to some knowledge of the most perfect intellectual life, that is in the three persons, who in the same divine truth live by the same act of pure intelligence which is subsisting intelligence itself.We certainly know how Trinitarian the semiotic thought of John of St. Thomas, O.P., is! He clearly saw "[traces of the Trinity ( *vestigia Trinitatis* )](https://isidore.co/aquinas/summa/FP/FP045.html#FPQ45A7THEP1)" in nature.felix festum Sanctissimæ Trinitatis! ☘