This is Trinity Sunday the day when we celebrate the Father, the Son and Holy Spirit, three persons in one and that is God. This is the one festival in the Christian year that does not relate to any events that have happened or that will happen in time. You get Advent, Christmas, Lent, Easter, Ascension, Pentecost all relate to specific events in Christ’s life on earth. But Trinity Sunday is totally different, it refers to a reality that has no date and it leads us to ask about when did God become the Holy Trinity? Trinity Sunday and has been called the most puzzling doctrine in the Christian faith and the central truth of the Christian faith. This doctrine unites all true Christians and separates us from those who are not Christian. You may believe and still not be a Christian, but if you deny this doctrine in your heart, you are not a Christian at all. Someone has said it this way: If you try to explain the Trinity, you will lose your mind. But if you deny it, you will lose your soul. We live by faith as well as knowledge and it is FAITH that teaches us that God is indeed three in one, Father, Son and Holy Spirit. We are promised that, by the transformation of grace, we may live in Christ as he lives in us. GRACE is spelt out for us like this, God’s Riches At Christ’s Expense. So we too, are to become living and loving sacrifices of God to the world.