"I [Myself] am this Living Bread that came down from heaven. If anyone eats of this Bread, he will live forever; and also the Bread that I shall give for the life of the world is My flesh (body).Then the Jews angrily contended with one another, saying, How is He able to give us His flesh to eat? And Jesus said to them, I assure you, most solemnly I tell you, you cannot have any life in you unless you eat the flesh of the Son of Man and drink His blood [unless you appropriate His life and the saving merit of His blood].He who feeds on My flesh and drinks My blood has (possesses now) eternal life, and I will raise him up [from the dead] on the last day.For My flesh is true and genuine food, and My blood is true and genuine drink.He who feeds on My flesh and drinks My blood dwells continually in Me, and I [in like manner dwell continually] in him.Just as the living Father sent Me and I live by (through, because of) the Father, even so whoever continues to feed on Me [whoever takes Me for his food and is nourished by Me] shall [in his turn] live through and because of Me.This is the Bread that came down from heaven. It is not like the manna which our forefathers ate, and yet died; he who takes this Bread for his food shall live forever."
(John 6:51-58 AMP)
The rules on communion come from the Apostle Paul in 1 Corinthians 11:20-34. I pasted below the account as read in The Message version of the bible, because it reads a little better than the KJV version. However, I would encourage you to read it in other versions as well.
"And then I find that you bring your divisions to worship—you come together, and instead of eating the Lord's Supper, you bring in a lot of food from the outside and make pigs of yourselves. Some are left out, and go home hungry. Others have to be carried out, too drunk to walk. I can't believe it! Don't you have your own homes to eat and drink in? Why would you stoop to desecrating God's church? Why would you actually shame God's poor? I never would have believed you would stoop to this. And I'm not going to stand by and say nothing.
Let me go over with you again exactly what goes on in the Lord's Supper and why it is so centrally important. I received my instructions from the Master himself and passed them on to you. The Master, Jesus, on the night of his betrayal, took bread. Having given thanks, he broke it and said,
This is my body, broken for you. Do this to remember me.
After supper, he did the same thing with the cup: This cup is my blood, my new covenant with you. Each time you drink this cup, remember me.
What you must solemnly realize is that every time you eat this bread and every time you drink this cup, you reenact in your words and actions the death of the Master. You will be drawn back to this meal again and again until the Master returns. You must never let familiarity breed contempt.
Anyone who eats the bread or drinks the cup of the Master irreverently is like part of the crowd that jeered and spit on him at his death. Is that the kind of "remembrance" you want to be part of? Examine your motives, test your heart, come to this meal in holy awe.
If you give no thought (or worse, don't care) about the broken body of the Master when you eat and drink, you're running the risk of serious consequences. That's why so many of you even now are listless and sick, and others have gone to an early grave. If we get this straight now, we won't have to be straightened out later on. Better to be confronted by the Master now than to face a fiery confrontation later.
So, my friends, when you come together to the Lord's Table, be reverent and courteous with one another. If you're so hungry that you can't wait to be served, go home and get a sandwich. But by no means risk turning this Meal into an eating and drinking binge or a family squabble. It is a spiritual meal—a love feast.
The other things you asked about, I'll respond to in person when I make my next visit."
(1Corinthians 11:20-34 MESSAGE)
Last but not least are the scriptures from Matthew, Mark, and Luke from the New English Translation of the bible:
"While they were eating, Jesus took bread, and after giving thanks he broke it, gave it to his disciples, and said, "Take, eat, this is my body." And after taking the cup and giving thanks, he gave it to them, saying, "Drink from it, all of you, for this is my blood, the blood of the covenant, that is poured out for many for the forgiveness of sins. I tell you, from now on I will not drink of this fruit of the vine until that day when I drink it new with you in my Father's kingdom.""
(Matthew 26:26-29 NET)
"While they were eating, he took bread, and after giving thanks he broke it, gave it to them, and said, "Take it. This is my body." And after taking the cup and giving thanks, he gave it to them, and they all drank from it. He said to them, "This is my blood, the blood of the covenant, that is poured out for many. I tell you the truth, I will no longer drink of the fruit of the vine until that day when I drink it new in the kingdom of God.""
(Mark 14:22-25 NET)
"And he said to them, "I have earnestly desired to eat this Passover with you before I suffer. For I tell you, I will not eat it again until it is fulfilled in the kingdom of God."Then he took a cup, and after giving thanks he said, "Take this and divide it among yourselves. For I tell you that from now on I will not drink of the fruit of the vine until the kingdom of God comes."Then he took bread, and after giving thanks he broke it and gave it to them, saying, "This is my body which is given for you. Do this in remembrance of me." And in the same way he took the cup after they had eaten, saying, "This cup that is poured out for you is the new covenant in my blood."
(Luke 22:15-20 NET)
