“That as sin hath reigned unto death, even so might grace reign through righteousness unto eternal life by Jesus Christ our Lord.”
King James Version (KJV)
5:21 That as sin had reigned - so grace also might reign - Which could not reign before the fall; before man had sinned. Through righteousness to eternal life by Jesus Christ our Lord - Here is pointed out the source of all our blessings, the rich and free grace of God. The meritorious cause; not any works of righteousness of man, but the alone merits of our Lord Jesus Christ. The effect or end of all; not only pardon, but life; divine life, leading to glory.
Ro 5:21 That as sin hath reigned. Hence, with this gracious gospel of mercy for every penitent believer, even as sin once reigned and caused universal death, so might grace reign. All might accept the gospel, and enjoy the divine favor, and thus secure eternal life through Jesus Christ. The scope of God's plan of salvation is wide enough for all. If there are those who are unsaved, it is because they will not come to Christ that they might have life.