Calvin’s Tracts: Vol II, page 213.

Nature of the Knowledge of Christ

“We must hold therefore that Christ, being the eternal Son of God, and of the same essence and glory with the Father, assumed our flesh, to communicate to us by right of adoption that which he possessed by nature, namely, to make us sons of God.  This is done when ingrafted by faith into the body of Christ, and that by the agency of the Holy Spirit we are first counted righteous by a free imputation of righteousness, and then regenerated to a new life: whereby being formed again in the image of our heavenly Father, we renounce the old man.”