6:3-10 Baptism teaches the necessity of dying to sin, and being as it were buried from all ungodly and unholy pursuits, and of rising to walk with God in newness of life. Unholy professors may have had the outward sign of a death unto sin, and a new birth unto righteousness, but they never passed from the family of Satan to that of God. The corrupt nature, called the old man, because derived from our first father Adam, is crucified with Christ, in every true believer, by the grace derived from the cross. It is weakened and in a dying state, though it yet struggles for life, and even for victory. But the whole body of sin, whatever is not according to the holy law of God, must be done away, so that the believer may no more be the slave of sin, but live to God, and find happiness in his service.
5. For if we have been planted together—literally, "have become formed together." (The word is used here only).
in the likeness of his death, we shall be also in the likeness of his resurrection—that is, "Since Christ's death and resurrection are inseparable in their efficacy, union with Him in the one carries with it participation in the other, for privilege and for duty alike." The future tense is used of participation in His resurrection, because this is but partially realized in the present state. (See on Ro 5:19).