11Day after day every priest stands and performs his religious duties; again and again he offers the same sacrifices, which can never take away sins. 12But when this priest had offered for all time one sacrifice for sins, he sat down at the right hand of God.
She pointed out as Hebrews here does that all the sacrifices before did not take away the sins. But, they could only point to the one True Sacrifice that can take away ALL Sins once and for all. The Priests before were also having to offer a sacrifice for themselves as well. But Christ did not need a sacrifice for Himself but He was the High Priest that performed the only sacrifice that could be offered to take away our sins and that was of Himself. And this time there were no more sacrifices to be made and Christ our High Priest SAT DOWN at the right hand of the Father. He sat down because there is nothing more for the High Priest to do. Just like Christ said on the cross. "IT IS FINISHED."
Grace and Peace,
Lord’s Day 12
31. Why is He called “Christ,” that is, Anointed?
Because He is ordained of God the Father and anointed with the Holy Spirit to be our chief Prophet and Teacher, who has fully revealed to us the secret counsel and will of God concerning our redemption; and our only High Priest, who by the one sacrifice of His body, has redeemed us, and ever lives to make intercession for us with the Father; and our eternal King, who governs us by His Word and Spirit, and defends and preserves us in the redemption obtained for us.
 Ps 45:7 [Heb 1:9]; Isa 61:1 [Lk 3:21-22, 4:18];  Deut 18:15 [Acts 3:22];  Jn 1:18, 15:15;  Ps 110:4 [Heb 7:17, 21];  Heb 9:12, 10:11-14;  Rom 5:9-10, 8:34; Heb 9:24; 1 Jn 2:1;  Zech 9:9 [Mt 21:5]; Lk 1:33;  Ps 2:6; Isa.61:1-2; Mt 28:18-20; Jn 10:28; 1 Pt 2:24; Rev 12:10-11, 19:16
32. But why are you called a Christian?
Because by faith I am a member of Christ and thus a partaker of His anointing, in order that I also may confess His Name, may present myself a living sacrifice of thankfulness to Him, and with a free conscience may fight against sin and the devil in this life, and hereafter in eternity reign with Him over all creatures.
 Acts 11:26; 1 Cor 12:12-27; 1 Jn 2:20, 27;  Joel 2:28 [Acts 2:17]; 1 Jn 2:27;  Mk 8:38, 10:32; Rom 10:9-10; Heb 13:15;  Rom 12:1; 1 Pt 2:5, 9; Rev 1:6, 5:8, 10;  Gal 5:16-17; Eph 6:11; 1 Tim 1:18-19;  Mt 25:34; Eph 6:12; 2 Tim 2:12; Rev 3:21