For the Trinitarian, Where Is the Spirit?

I have been challenged by Oneness believers regarding the Holy Spirit. If He is also God, they say, then why don't you sing to Him, or pray to Him, as you do to the Father and the Son? They consider that challenge to be quite clever.

It's not, actually.

In the economy of the Trinity, the Son submits to the Father, and the Spirit submits to both the Father and the Son. What does the Son do? He points men to the Father: "No one has ever seen God; the only God, who is at the Father’s side, He has made Him known" (John 1:18). And what does the Spirit do? He points men to the Son: "But when the Helper comes, whom I will send to you from the Father, the Spirit of truth, who proceeds from the Father, He will bear witness about Me" (John 15:26).

And that answers the challenge of the Oneness. Why do Christians not pray to, or worship, the Spirit? Because worship is something inspired by the Spirit, and He points men to Jesus, not to Himself: "When the Spirit of truth comes, He will guide you into all the truth, for He will not speak on his own authority, but whatever He hears He will speak" (John 16:13). It is because we worship the Father and the Son that we experience the Spirit.