The communal life of Father, Son and Spirit is totally satisfying. Nothing and no one is needed to make the Triune life whole. There is nothing lacking so that the three are forced to move beyond their own shared life to gain fullness. And yet, the Triune One does not want to be God without us. We add nothing to Him, but He wants to include us within His communion of joy. So when we turned away from Him, He turned towards us acting to turn us back to Himself.
However, the Triune God’s reconciling action is not a plan B. His action is not merely a reaction to the problem of human sin. The action of the Triune God, in the face of human opposition, takes place to achieve his first and only purpose. He always wanted us in fellowship with himself within His own circle of love. This is His original purpose and He sticks with it even though we reject it. He must do so because he only wants to be God as our Father, through Jesus in the Spirit. Yes, He must go out from himself to reconcile us to himself according to his original purpose of fellowship with us as dearly loved children.
So, in Jesus, God himself acts and speaks and suffers and triumphs reconciling the world to himself. And what takes place in Jesus, the Father’s Spirit anointed Son, is the accomplishment of the original will of God. His decision to be for us and with us as one of us. In this unique man, God does not simply react to human sin. He is rather being faithful to his own eternal purpose and so true to who he is.