The liturgy for the day typically includes readings from Scripture that reflect on the doctrine of the Trinity. Common readings may include Matthew 28:16-20, where Jesus commissions His disciples and instructs them to baptize “in the name of the Father, and of the Son, and of the Holy Spirit.”
16 Then the eleven disciples went away into Galilee, into a mountain where Jesus had appointed them.
17 And when they saw him, they worshipped him: but some doubted.
18 And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth.
19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.
The Athanasian Creed and Trinity
THE FESTIVAL OF THE MOST HOLY TRINITY, the pinnacle of the Christian year, is the last major feast and beckons us to stand in awe of our God, Who has unveiled Himself in three magnificent Persons: Father, Son, and Holy Ghost. The doctrine of the Holy Trinity, a Mystery of Faith, is a testament to the profound and unfathomable depth of our God.