John 17:2-3: "even as thou gavest him authority over all flesh, that to all whom thou hast given him, he should give eternal life. 3 And this is life eternal, that they should know thee the only true God, and him whom thou didst send, (even) Jesus Christ."
This free audio Bible study discusses the Lord's Supper and includes some thoughts about possible comparisons between a literal blood transfusion and the blood shed by Christ on the cross.