4 We have been placed with him among the dead through baptism into death: so that as Christ came again from the dead by the glory of the Father, we, in the same way, might be living in new life. 5 For, if we have been made like him in his death, we will, in the same way, be like him in his coming to life again; 6 Being conscious that our old man was put to death on the cross with him, so that the body of sin might be put away, and we might no longer be servants to sin.
Matthew Henry's Commentary on Romans 6:4-6
Commentary on Romans 6:3-10
(Read Romans 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.