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TrinityQ. This past Sunday, we celebrated the Solemnity of the Most Holy Trinity. Why is this doctrine so important?

A. There are many reasons, but most prominent among them is this: it’s who God is. God is a Trinity of Persons – the Father, the Son, and the Holy Spirit. This is actually God’s “name”. In the Scriptures, one’s name defines a person’s identity.

At the end of the Gospel of Matthew, Jesus urges his followers to “(g)o therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all that I have commanded you; and behold, I am with you always, to the close of the age” (Matt 28:19-20, emphasis mine).

Notice Jesus says, “name”, not “names”. There are not three Gods here; there is one God, but three divine Persons within the Godhead. Their essence – what they are, essentially, is divine. Divinity is what they are “made of”, so to speak. In the case of Jesus, of course, who was the divine Logos from all eternity, he “wedded” a human nature to his preexisting divine nature at the moment of the Incarnation.

Q. So many still find the Trinity difficult to understand or believe in.

A. I’ve got two pieces of news for you, which may be surprising: first, one must believe in the Trinity to hold the Catholic faith. It is a truth revealed by God. On a somewhat practical level, if you have the question of God wrong, you’ll never get anything else right about the faith. To use a management term, it’s a “top-down” process.

Secondly, don’t worry if you don’t completely understand the Trinity, because no one does. That’s right – no saint or theologian – not even the great St Thomas Aquinas, the “Angelic Doctor” – has ever claimed that they fully understood the Trinity. In fact, if they had claimed that they did, they would have been guilty of heresy. Why?

If you could completely understand the Trinity, that would mean that you were greater than God, which is obviously not the case. Your finite, created mind, however intelligent it may be, cannot comprehend God in his infinity. However, that does not mean that we can’t know anything about the Trinity.

One can know something is true without being able to perfectly understand or explain it: for example, I know electricity works: I flip the switch, and the room lights up. Can I explain it? No. I don’t know how the energy moves throughout the circuitry, etc. I just know the truth of electricity, that it works. In the same way, we can be certain about whatever God chooses to reveal about himself, even if we can’t fully comprehend it – and what he has revealed is that he is a Trinity of persons.

Holy_TrinityQ. This Sunday is the Solemnity of the Most Holy Trinity, and we Catholics are used to hearing about God the Father, God the Son, and God the Holy Spirit. But some Australian priests got a bit “creative” with the liturgy a few years ago, and began opening the Mass in a different way. Instead of saying, “In the name of the Father, and of the Son, and of the Holy Spirit”, they said this: “In the name of the Creator, the Redeemer, and the Sanctifier”. They were severely reprimanded by their bishop. Why was this such a big deal to the Church?

A. What these priests did was wrong on many levels. The biggest problem was that creating, redeeming and sanctifying are things that God does, but they are not who he is. Yes, it is true that God created the cosmos, and that Jesus redeemed us, and that the Holy Spirit sanctifies us (makes us holy, provided we cooperate with God’s grace). But creating, redeeming, and sanctifying are God’s activities, not his identity. He is Father, Son, and Holy Spirit (cf. Matthew 28:19).

Q. Why did God not reveal himself as a Trinity of Persons until the age of the New Covenant, in which we are now living?

A. God dealt with humanity as a wise parent deals with a child. This has often been called the “divine pedagogy”. A small child cannot understand trigonometry or quantum physics. One must start with simple concepts, like “2 + 2 = 4”, and build from there. More truth is added when the student is ready to handle it. In the same fashion, God gradually revealed truth about himself to human beings, culminating in the revelation of the Most Holy Trinity.

I actually think that the Trinity is all over the Old Testament as well – God creating the universe by his powerful “Word” in Genesis – the Word that later became flesh, Jesus Christ (John 1:14). God’s Spirit hovered over the waters of creation  – the Holy Spirit (Genesis 1:2). God said, “Let us make man in our image” (Genesis 1:26). All of this is less explicit than we might like it to be, but the doctrine is there. I believe that one reason God did not more clearly spell out the doctrine of the Trinity until later in salvation history was the problem of polytheism in the ancient Near East.

In the Old Testament period, God chose to reveal himself to the world gradually through the agency of his people, Israel. The ultimate plan was for all the nations (or “Gentiles”, ethnic groups) outside of Israel to join God’s family. This was promised to Abraham, the father of the Jewish people, when God promised him that all the nations of the earth would be blessed through his “seed”  (Genesis 22:18). This finally happened in the age of the universal (the word “Catholic” means “universal”) Church of Jesus Christ, the son (descendant, or “seed”) of Abraham, according to the flesh (Matthew 1:1).

But, in the time of ancient Israel, God’s people lived among many other peoples who were polytheists (they believed in many “gods”). At that time, it was more important for Israel to reveal to the world that there is only one true God. The revelation that there are three persons in the one God would have to wait. If that truth had been fully proclaimed at that point, it may have confused non-Jews, who may have viewed the Trinity as three different “gods”, rather than three Divine Persons sharing one Divine nature.