God has never been alone. From all eternity, He has been a communion of three persons—the Father, the Son, and the Spirit, loving one another. Within this communion, there is one purpose, flowing from their self-giving love. And the three always work together toward this single purpose.

That purpose is fulfilled in Christ, and in us being united with Him. Even now, our lives are “hidden with Christ in God,” and when He appears, we will appear with Him in glory. At the end, God will bring all things together in Christ—things in heaven and on earth. 

Because we are hidden with Christ in God, we share in His relationship with the Father through the Spirit.  Paul tells us that before the world began, God destined us for adoption: “God decided in advance to adopt us into his own family by bringing us to himself through Jesus Christ. This is what he wanted to do, and it gave him great pleasure” (Ephesians 1:5 NLT).

Here, we see God’s communal purpose is adoption. The Father brings us into the Son’s relationship with Him. Through the Spirit within us, we can cry out, “Abba, Father.” In love, the Father chose us, through His Son, so we could share in His relationship with the Beloved Son. As adopted children, we are welcomed into the eternal love shared by Father, Son, and Spirit.

If we want to understand who we are and why we exist, we must begin here: with the eternal relationship of the Father and the Son in the Spirit. This relationship explains creation, our purpose, and our destiny. The Trinity made us to share in the life and love they already enjoy together.