I have updated my blog and now could not put several pictures that I have used before into this blog - the icon of the Trinity, the head of Jesus, etc. Updates are frustrating until one gets used to using them. I mostly just thought today of highlighting some of the Sunday Liturgy for this feast. We will have a Communion service as still no Mass here.
"Blest be God the Father, and the Only Begotten Son of God, and also the Holy Spirit, for he has shown us his merciful love."
That is the entrance antiphon for the Mass.
The Collect is worth reading:
"God our Father, who by sending into the world the Word of truth and the Spirit of sanctification made known to the human race your wondrous mystery, grant us, we pray, that in professing the true faith, we may acknowledge the Trinity of eternal glory and adore your Unity, powerful in majesty."
The place to find the theology of the feast, it is in its special Preface. It tells us "For with your Only Begotten Son and the Holy Spirit you are one God, one Lord: not in the unity of a single person, but in a Trinity of one substance.
For what you have revealed to us of your glory
we believe equally of your Son
and of the Holy Spirit.
so that, in the confessing of the true and eternal Godhead,
you might be adored in what is proper to each Person,
their unity in substance,
and their equality in majesty."
We need to pray over that and remember that the doctrine of the Trinity is a mystery that we will never fully understand in this life, but we are blessed by our Triune God! it is a mystery of love - let us rejoice in their love!