05/31/2026
HOW TO KNOW THE TRINITY
Homily for Trinity Sunday, at St. Benedict's Abbey
I am not a poet. And I do know it. But imagine a group of poets who gather together once or twice a year. When this society of poets comes together, they “talk shop”—that is, they talk about poetry. Yes, they read and write poems. But they also reflect on poetry itself. They discuss the nature of poetry, things such as what distinguishes poetry from elegant prose, or what makes a poem a good one rather than a bad one.
Why do these poets talk about poetry? Because they love poetry. When we love something, we talk about it, and find words to express it. That is a way of celebrating what we love. Just so, these poets talk about poetry as a way of celebrating what they love.
So, these poets have two ways of knowing poetry. They know it experientially when they practice poetry, when they read and write it. But when they reflect on poetry and discuss it, they know it in a different way. They have what might be called an articulated knowledge of poetry. They know it through expressions, definitions, and verbal formulas.
The experiential knowledge is the more regular and frequent way in which they know poetry. They have this throughout the year as they read, write, and listen to poetry. But now and again, such as when they gather, they indulge in the articulated knowledge. And as noted, one reason to do this is to celebrate poetry.
How does this apply to Trinity Sunday? Here is my application to the Most Holy Trinity. It has to do with these two ways of knowing something, with experiential knowledge and so-called articulated knowledge. Throughout the year, we Christians have experiential knowledge of the Trinity. We know God through a personal encounter; indeed, we know God experientially through sharing in His life.
This happens particularly through Jesus Christ. We live in Christ. By means of His humanity, we are united to Him through faith and love. And this union with Christ leads us into the Trinity. United to the Son of God, we know the Father as the one from whom Christ comes and to whom He returns. And in this relationship between the Father and the Son, we know the Spirit as the bond of peace and the joy of love. Life in Christ gives us experiential knowledge of the Trinity.
Let me quickly note three special ways in which we have this experiential knowledge of the Trinity, and in which we can grow in this experiential knowledge. One is through the liturgy, especially the sacraments and most especially the Mass—what we are doing right now. In the liturgy, we are united to the Son and in turn we enter into the Trinity.
Another special way is by loving our neighbor. When we love another, especially in a selfless, self-giving way, we are conformed to Jesus Christ. We live in His love and we thus experience closeness to the Trinity.
A final special way is by participation in the Church, in the community of believers. This happens by receiving from the Church and contributing back to the Church. As members of the Body of Christ, we are gathered into Christ, united by the Holy Spirit, and devoted to the Father.
So, we have this experiential knowledge of the Trinity all year round. Yet on days like today, Trinity Sunday, we also reflect on and articulate truths about the Trinity. We use worked-out expressions and definitions to think about the Trinity.
For example, with this articulated knowledge we say things such as: There is one God and yet three Persons in God, Father, Son, and Holy Spirit. Each Person is fully God, each is fully divine. Still, all three Persons together are not three Gods but one God.
In this articulated knowledge, we also say that the Father is God. And that the Son is God: He is God from the Father—“God from God, Light from Light, true God from true God.” We also say that the Holy Spirit is God: God from the Father and the Son. He “proceeds from the Father and the Son,” or we can say, from the Father through the Son.
But why do we bother with these articulations? They can seem abstract and difficult to understand. Why not just stick to the experiential knowledge that comes from living in Christ? Isn’t that enough?
I think we can see three reasons why we have this articulated knowledge. They correspond to the reasons that a society of poets has articulated knowledge of poetry. As noted, one reason is that it is a way of joyfully celebrating what we love. We love God the Trinity and so we celebrate the Trinity by speaking about the Trinity.
Another reason is that the articulated knowledge serves a regulatory purpose. It helps us to see whether we are on the mark or off the mark. For poets, their articulated knowledge of poetry can help them see what counts as poetry and what does not. For us, our articulated knowledge of the Trinity helps us make sure we turn to the true God and not a false idea of God.
For example, we note that the three Persons are not parts of God, which is a common misunderstanding in my experience. The Persons are not parts, as though each were one-third of God. No, each Person is fully God, having all the divine power, wisdom, majesty. Each is fully God and together they are the one God.
A third reason for the articulated knowledge is explanatory. When the poets want to explain to a newcomer what poetry is, they can do so with their articulated knowledge. Likewise, when we want to explain what we believe to non-believers, we can use our articulated knowledge. We can use worked-out expressions and formulas. It is not that we are proving the Trinity to them, but inviting them to believe what we believe.
Much ink has been spilt—and is still spirt—over which to prefer, experiential knowledge or articulated knowledge. But both are indispensable and they go together. Of course, experiential knowledge is crucial. Through it we can develop articulated knowledge. Through their experiential knowledge of poetry, poets can articulate what it is. Through our experience of the Trinity, the Church has articulated what the Trinity is.
Yes, we can get too caught up in articulated knowledge and neglect the experiential knowledge. When this happens, we have those famous words from ‘The Imitation of Christ:’ “What good does it do to speak learnedly about the Trinity if, lacking humility, you displease the Trinity?”
But on the other hand, if people say—as they sometimes do—that we do not need an articulated knowledge of the Trinity, that is wrong. We have the witness of the Tradition. Many people, including saints, fought, suffered, and even died for the correct articulations of the Trinity. Let us be thankful for the correct expressions, definitions, and formulas that we have for knowing the Trinity. And to appreciate this articulated knowledge, I offer the three purposes already mentioned: that it is celebratory, regulatory, and explanatory.