2 John 9–11 (NKJV)
9 Whoever transgresses and does not abide in the doctrine of Christ does not have God. He who abides in the doctrine of Christ has both the Father and the Son. 10 If anyone comes to you and does not bring this doctrine, do not receive him into your house nor greet him; 11 for he who greets him shares in his evil deeds.
Last week we learned that the Father and the Son are inseparable. He who does not honor the Son does not honor the Father; and he who does not honor the Father does not honor the Son. This unity of the Father and the Son is a major theme throughout the Apostle John’s writings. Alone among the Gospel writers, John records Jesus’ words to the disciples at the last Passover feast. The unity of Father, Son, and Spirit is a major theme of these words. Consider these statements that Jesus makes:
Now the Son of Man is glorified, and God is glorified in Him. If God is glorified in Him, God will also glorify Him in Himself, and glorify Him immediately… you believe in God, believe also in Me… He who has seen Me has seen the Father… Do you not believe that I am in the Father, and the Father in Me? The words that I speak to you I do not speak on My own authority; but the Father who dwells in Me does the works. Believe Me that I am in the Father and the Father in Me… the Helper, the Holy Spirit, whom the Father will send in My name, He will teach you all things, and bring to your remembrance all things that I said to you…when the Helper comes, whom I shall send to you from the Father, the Spirit of truth who proceeds from the Father, He will testify of Me… He will guide you into all truth; for He will not speak on His own authority; but whatever He hears He will speak; and He will tell you things to come. He will glorify Me, for He will take of what is Mine and declare it to you. All things that the Father has are Mine. Therefore I said that He will take of Mine and declare it to you.
This inseparability of Father, Son, and Spirit explains why John takes such pains in our epistle to refute the errors of Docetism. It also explains why the Trinity was the first major debate in the history of the Church. Who is this God we worship? Who is Jesus? Who is the Spirit? The first commandment declares to us, “You shall have no other gods before me.” So who is this God we worship? He is Father, Son, and Holy Spirit.
The inseparability of Father, Son, and Spirit also explain why, as a congregation, we have prioritized reciting the historic ecumenical creeds together throughout the year. Depending on the time of year, we recite or sing the Apostles’ Creed, the Athanasian Creed, the Nicene Creed, and the Definition of Chalcedon. Each of these creeds reminds us whom we worship – we worship Father, Son, and Holy Spirit; we do not worship some abstract deity called “God”; we worship the God who revealed Himself in the face of our Lord Jesus Christ and who has poured out the Spirit to lead and guide us into the truth.
This morning, remember that it is this God, the Creator of all things and the Redeemer of His people Israel, who has called you here to worship. It is to Him we offer praise, before Him we confess our sins, to Him we present our offerings, from Him we receive instruction, and with Him we feast at the Table. And He is no puny tribal deity or idol, but the Living God who rules over heaven and earth.

So reminded into whose presence we have come and whom we are worshiping, let us bow before Him, acknowledging our sins and transgressions and asking Him to forgive us through the shed blood of Jesus Christ. Let us kneel as we confess our sins.