We celebrate the Feast of the Holy Trinity today because in 1334 Pope John XXII decided that on the Sunday after Pentecost the Western Church would celebrate the Trinity. It was already a popular feast. Nearly two hundred years previously Thomas Becket was consecrated a bishop on this day, and kept the feast. Its popularity in the British Isles is shown by the fact that we number the Sundays between now and Advent not ‘after Pentecost’ but ‘after Trinity’. It defines the majority of the liturgical year for us.
This morning, at the very beginning of our service, the following words were said, ‘In the name of the Father, and of the Son, and of the Holy Spirit.’ We said ‘Amen’ to signify our assent and many Christians make the sign of the Cross as the words are said. At the end of the Eucharist I, as the priest, will pray that God will bless you as I invoke the name of the Trinity and make the sign of the Cross. These words and gestures are not random, or the result of a whim, but are part of our tradition of worship as Christians. This is how we express and declare our faith; through words and actions. These help us to reinforce what we believe and help us to live out our faith.
In this morning’s epistle we heard the closing words of Paul’s Second Letter to the Corinthians. Their relations have not been been easy or pleasant. Paul has written urging reconciliation, something which the church always needs, and something at the heart of our faith. This is because it is what Jesus achieves on the Cross, our reconciliation with God and with each other. Paul urges the church to embrace in love, as we will soon do during the Peace. He ends with words which are very familiar to us: ‘The grace of our Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit be with you all.’ (2Cor 13:13) We often repeat these words, and call them ‘the Grace’.
This Grace of Our Lord Jesus Christ is the unmerited kindness we have received through him, which we do not deserve. We have not earned it, but receive it through Him. The Love of God is such that He gave His only Son ‘that whoever believes in him should not perish but have eternal life. For God sent the Son into the world, not to condemn the world, but that the world might be saved through him.’ (Jn 3:16-17). The Love of God sees Jesus take flesh by the Holy Spirit, to be born of the Blessed Virgin Mary, preach repentance and the nearness of the Kingdom of God, and die for us on the Cross. Then he rose again, ascended, sent the Holy Spirit to us at Pentecost, and promised to come again as our Judge. Fellowship, or Communion is what the persons of the Trinity – the Father, the Son and the Holy Spirit – have between each other, and which we the Church are invited to share. It is the imparting of the grace, the undeserved kindness of God. In the act of Holy Communion we are fed with the Body and Blood of Christ, so that we might share in the divine life here on earth.
We can do this because we have been baptised. In this morning’s Gospel Jesus tells the apostles to go and make disciples ‘baptizing them in the name of the Father and of the Son and of the Holy Spirit’ (Mt 28:19). This is the central act of our faith, it is how we enter the Church; how we put on Christ; how we are saved. It defines us as Christians.
In public prayer, at the end of Psalms and Canticles, we end with the words, ‘Glory be to the Father and to the Son and to the Holy Spirit ; As it was in the beginning is now and ever shall be world without end. Amen.’ This is a doxology which means ‘Words that praise God’ We say these words because they express our faith.
Jews, Muslims, Jehovah’s Witnesses, Mormons and others cannot accept the fact that as Christians we say that we do not worship three Gods, but One God. That we believe that the Son is God, not less than the Father, likewise the Holy Spirit, and yet there are not three Gods but one God. These are not manifestations, but persons which share the same divine essence and yet are distinct. The Father uncreated; the Son begotten; the Spirit proceeding. It is why we stand up and state our beliefs. It matters. We do it regardless of the cost. Simply believing the Christian faith and declaring it publicly can lead to imprisonment or death in some countries around the world today.
Our faith matters. It can change lives. It can change the world. It isn’t a private concern, something to be hid away politely. It is the most important thing there is. It is something to fill us with joy. It is something that we should share with others, so that they might believe and give glory to God the Father, God the Son, and God the Holy Spirit, to whom be ascribed as is most right and just, all might, majesty, glory, dominion, and power, now and forever.