9:23 In a way that we don't fully understand, the earthly tabernacle was a copy and symbol of heavenly realities. This purification of the heavenly things can best be understood as referring to Christ's spiritual work for us in heaven (see the note on 8:5).
9:24 Among references to priests, tabernacles, sacrifices, and other ideas unfamiliar to us, we come to this description of Christ as our mediator, appearing in God's presence on our behalf. We can relate to this role and be encouraged by it. Christ is on our side at God's side. He is our Lord and Savior. He is not there to convince or remind God that our sins are forgiven, but to present both our needs and our service for him as an offering (see 7:25).
9:24-28 All people die physically, but Christ died so that we would not have to die spiritually. We can have wonderful confidence in his saving work for us, doing away with sin--past, present, and future. He has forgiven our past sin--when he died on the cross, he sacrificed himself once for all (9:26); he has given us the Holy Spirit to help us deal with present sin; he appears for us now in heaven as our high priest (9:24); and he promises to return (9:28) and raise us to eternal life in a world where sin will be banished.
9:26 The "end of the ages" refers to the time of Christ's coming to earth in fulfillment of the Old Testament prophecies. Christ ushered in the new era of grace and forgiveness. We are still living in the "end of the ages." The day of the Lord has begun and will be completed at Christ's return.