Throughout the month of June, in honor of the Unity of the Three Divine Persons, there will be excerpts from the Roman Catechism of the Council of Trent provided for your reflection.
Practical Admonitions Concerning The Mystery Of The Trinity
Since nowhere is a too curious inquiry more dangerous, or error more fatal, than in the knowledge and exposition of this, the most profound and difficult of mysteries, let the pastor teach that the terms nature and person used to express this mystery should be most scrupulously retained; and let the faithful know that unity belongs to essence, and distinction to persons.
But these are truths which should not be made the subject of too subtle investigation, when we recollect that he who is a searcher of majesty shall be overwhelmed by glory. We should be satisfied with the assurance and certitude which faith gives us that we have been taught these truths by God Himself, to doubt whose word is the extreme of folly and misery. He has said: Teach ye all nations, baptising them in the name of the Father, and of the Son, and of the Holy Ghost; and again, there are three who give testimony in heaven, the Father, the Word, and the Holy Ghost; and these three are one.
Let him, however, who by the divine bounty believes these truths, constantly beseech and implore God and the Father, who made all things out of nothing, and ordereth an things sweetly, who gave us power to become the sons of God, and who made known to the human mind the mystery of the Trinity let him, I say, pray unceasingly that, admitted one day into the eternal tabernacles, he may be worthy to see how great is the fecundity of the Father, who contemplating and understanding Himself, begot the Son like and equal to Himself, how a love of charity in both, entirely the same and equal, which is the Holy Ghost, proceeding from the Father and the Son, connects the begetter and the begotten by an eternal and indissoluble bond; and that thus the Essence of the Trinity is one and the distinction of the Three Persons perfect.