For centuries Christians have sung, confessed their faith, prayed, received new members into their community, and gone out into the world to live – with worship of a Trinitarian God who is Father, Son, and Holy Spirit. If we move now from the question , How do we know God? to the question , Who is God?, it is with the doctrine of the Trinity that we must begin. ….
Christians do not “believe in’ the doctrine of the Trinity (or any other doctrine). We believe in a living God . But the God we believe in is the God this doctrine confesses, the one living and true God who is Father, Son, and Holy Spirit.,…
Just as the first Christians could not talk about the one God who is the God of Israel and their God too without talking about the ‘Word’ or the ‘Son’ of God, so they could not talk about their God without talking about the Holy Spirit. The same God who is God over us as God the Father and Creator, and God with and for us as the incarnate Word and Son, is also God in and among us as God the Holy Spirit.
With these words from his book Christian Doctrine, Shirley Guthrie has helped generations of Christians to sense the mysterious and mystical presence of the living God. It has worked for me.
Prayer
Wonderful God, surround, fill, and guide me with your loving and powerful presence. Amen.

I have truly never understood the Trinity until I read your devotional…thank you!