Romans 6:10

For the death that he died, he died unto sin once: but the life that he liveth, he liveth unto God.

Christ's death unto sin was to pay the penalty due to sin, and the uniqueness of that event is expressed in the word "once," or "once for all," as it reads in the Greek (see English Revised Version (1885) margin). The Greek word is [@hapax]; and for other New Testament uses of this remarkable word, see under Hebrews 7:27 in this author's commentary on that book. The finality of Christ's sacrifice for sin precludes any such thing as the daily sacrifice of the mass, or, for that matter, any kind of an offering whatever that might be proffered by people. The true sacrifice for sin is Christ, who offered himself, and that only once, the same being once for all and forever.

Unto God ... stresses the unity of Christ with the Father. Christ is called "God" no less than ten times in the Greek New Testament, and for details on this see under Hebrews 1:8 in this series of commentaries. The New Testament conception of Christ in his present ascended and glorified state places him in heaven at God's right hand, and upon the very throne of God itself, God's throne actually being called "the throne of God and of the Lamb" (Revelation 22:1).