Where do you think my answer comes from?
Have you ever heard anyone else link the sacrifices in the books of Moses with Jesus telling people to eat His flesh and drink His blood?
I can't remember anyone else mentioning a connection like my answer did.
I have heard people claim that Jesus was referring to the last supper (Eucharist), but that does not really fit when you consider who Jesus was speaking to and when He said it in comparison to the time of the last supper.
I am not satisfied with what others have said to try to explain the words of Jesus, but I have studied the Bible with a mind open to what the people hearing Jesus would have known of the scriptures (Old Testament), and I know how to draw my own conclusions.
When Jesus spoke of drinking His blood, everyone hearing Him would have immediately thought of the commandments against the drinking of blood, which would then have led to remembering that the reason for the commandment was because the life is in the blood.
Leviticus 17:11
11 For the life of the flesh is in the blood: and I have given it to you upon the altar to make an atonement for your souls: for it is the blood that maketh an atonement for the soul. |
From the starting point of what the words of Jesus would have caused the hearers to remember, an explanation for His words became obvious to me.
You seem to have a different starting point than I do, probably because of looking at it from the teaching of the Catholic church instead of looking at it from the common knowledge of the people that heard Jesus speak.
If you start from the teaching of the Catholic church, you will end up with a different conclusion than the one I did.