Article from Building Faith – “Three Teaching Points of Trinity Sunday”
God is Love Because God is Trinity. “In the First Letter of John, we find one of the most comforting and profound claims about God, “So we have known and believe the love that God has for us. God is Love, and those who abide in love abide in God, and God abides in them.” (I John 4:16). For this to be true, for God to be love, completely and perfectly, God must also be Trinity. For there to be love you need three things; the lover, the beloved, and the love or union shared between the two. Only in the revelation of God as Trinity can we see that God is love.
The Trinity Is To Be Loved, Not Solved. “Look again at our verse from First John, “God is love, and those who abide in love abide in God, and God abides in them.” John is not trying to help us solve a puzzle; instead, he wants us to see that the Triune God has created us so that we might share in his love, that we might abide in God and God in us.
The Trinity is the Central Mystery of the Christian Faith and Life “When we are baptized, it is in the Name of God: Father, Son, and Holy Spirit. Our prayer is Trinitarian in shape; for example, the collects in the Book of Common Prayer (BCP pg. 211) are addressed to the Father, through the Son, in unity with the Holy Spirit. Many of the postures we use in worship and prayer are Trinitarian; the sign of the cross, for example, invokes the Name of the Triune God. The whole of our lives as Christians is a participation in the mystery of the Holy Trinity.