The Trinity is not an appendix to the Christian doctrine of God
This Sunday is Trinity Sunday, which is appropriately observed after Pentecost and the coming of the Holy Spirit. It is important that we not treat the Trinity as an appendix to the Christian doctrine of God, which is the unfortunate legacy of too much twentieth century theology. The Trinity is the Christian doctrine of God. Classically when Christians say "God" they mean, "Father, Son, and Holy Spirit." Please consider the following: