“In the doctrine of the Trinity we feel the heartbeat of God’s entire revelation for the redemption of humanity. Though foreshadowed in the Old Testament, it only comes to light fully in Christ.
Religion can be satisfied with nothing less than God himself. Now in Christ God Himself comes out to us, and in the Holy Spirit He communicates Himself to us.
The work of re-creation is trinitarian through and through. From God, through God, and in God are all things.
Re-creation is one divine work from beginning to end, yet it can be described in terms of three agents: it is fully accomplished by the love of the Father, the grace of the Son, and the communion of the Holy Spirit.
A Christian’s faith life, accordingly, points back to three generative principles. ‘We know all these things,’ says article 9 of the Belgic Confession, ‘from the testimonies of holy Scripture, as well as from the operations of the persons, especially from those we feel within ourselves.’
We know ourselves to be children of the Father, redeemed by the Son, and in communion with both through the Holy Spirit. Every blessing, both spiritual and material, comes to us from the triune God.
In that name we are baptized; that name sums up our confession; that name is the source of all the blessings that come down to us; to that name we will forever bring thanksgiving and honor; in that name we find rest for our souls and peace for our conscience.
Christians have a God above them, before them, and within them. Our salvation, both in this life and in the life to come, is bound up with the doctrine of the Trinity.”
–Herman Bavinck, Reformed Dogmatics: Holy Spirit, Church, and New Creation, Vol. 4, Ed. John Bolt, and Trans. John Vriend, (Grand Rapids, MI: Baker Academic, 2008), 4: 333–334.