Christ's Great Sacrifice
These things are only copies of what is in heaven, and so they had to be made holy by these ceremonies. But the real things in heaven must be made holy by something better. This is why Christ did not go into a tent that had been made by humans and was only a copy of the real one. Instead, he went into heaven and is now there with God to help us.
Christ did not have to offer himself many times. He wasn't like a high priest who goes into the most holy place each year to offer the blood of an animal. If he had offered himself every year, he would have suffered many times since the creation of the world. But instead, near the end of time he offered himself once and for all, so that he could be a sacrifice that does away with sin.
We die only once, and then we are judged. So Christ died only once to take away the sins of many people. But when he comes again, it will not be to take away sin. He will come to save everyone who is waiting for him.
The Law of Moses is like a shadow of the good things to come. This shadow isn't the good things themselves, because it cannot free people from sin by the sacrifices that are offered year after year. If there were worshipers who already have their sins washed away and their consciences made clear, there would not be any need to go on offering sacrifices. But the blood of bulls and goats cannot take away sins. It only reminds people of their sins from one year to the next.
When Christ came into the world, he said to God, "Sacrifices and offerings are not what you want, but you have given me my body. No, you are not pleased with animal sacrifices and offerings for sin." Then Christ said, "And so, my God, I have come to do what you want, as the Scriptures say."
The Law teaches that offerings and sacrifices must be made because of sin. But why did Christ mention these things and say that God did not want them? Well, it was to do away with offerings and sacrifices and to replace them. That is what he meant by saying to God, "I have come to do what you want." So we are made holy because Christ obeyed God and offered himself once for all.