Blondie, thanks for that perspective, but how do you reconcile your comments with John 6:52-56:
John 6:52-56
New International Version (NIV)
52 Then the Jews began to argue sharply among themselves, "How can this man give us his flesh to eat?"
53 Jesus said to them, "Very truly I tell you, unless you eat the flesh of the Son of Man and drink his blood,you have no life in you. 54 Whoever eats my flesh and drinks my blood has eternal life, and I will raise them up at the last day. 55 For my flesh is real food and my blood is real drink. 56 Whoever eats my flesh and drinks my blood remains in me, and I in them.
Nobody in ancient Israel had to drink the blood of any animal sacrifice to signify that they believe in the sacrifice and believe their sins are forgiven. But Jesus is commanding exactly that. He is telling us to drink his blood, take it into our bodies, as later represented by the wine. Jesus could have just said "this wine means my blood, which I will sprinkle on you" or "which you must dip your garment into" to denote having one's sins forgiven, atoned for. But he went further, he told us to drink it. Why?
Because, as he said in verse 53, by drinking his blood (and eating his flesh) we would have life in us, symbolically. In other words, the shedding of his blood was for forgiveness of sins, of atonement, but the action of drinking his blood symbolised an imparting of life.
If Jesus basically gave a figurative life-saving blood transfusion to all those who enter the new covenant, as the greatest act of love he could perform, can we really imagine him feeling that it is very sinful for someone to donate a small portion of their blood so that an anonymous recipient could later receive it in an emergency situation without which they would die?
If you were dying and urgently needed a blood transfusion to live, and Jesus was alive on earth and was the only person who could give you the blood you needed, what would he do?