Communion is the celebration of the Eucharist when we consume the body and blood of Christ. It looks like bread and wine, however during mass it is transformed into the body and blood of Christ.Because the Communion is not a symbol, but really the body and blood of Christ, it has power.There are many verses in the bible where Jesus said "He is the bread, the living bread and that it is His flesh and it is His blood".
We see in scriptures the Divine 'Vine' changed water into wine at Cana(John 2:1-10). Later the Divine 'Vine' changed wine into His Precious Blood at the last supper(Matt 26:27-28).
Jesus says In John 6:56: "HE WHO EATS MY FLESH AND DRINKS MY BLOOD, ABIDES IN ME AND I IN HIM."
It is the "true presence" of our Lord in the Holy Eucharist, the food provided by the vine, so that eternal life is imparted into each and every branch and which allows the branches to bear fruit. If anyone does not abide in Me, he shall be cast outside as the branch and wither; and they shall gather them up and cast them into the fire, and they shall burn ." John 15:6.
Also notice Truly, truly, I say to you, unless you eat the flesh of the Son of Man and drink His blood, you have no life in you; he who eats my flesh and drinks my blood, has eternal life, and I will raise him up at the last day." John 6:53-54.
There are many Bible verses clearly mentions that over drinking is the sin.
(Rom. 14:14) St. Paul states - I know, and am persuaded by the Lord Jesus, that there is nothing unclean of itself: but to him that esteemeth any thing to be unclean, to him it is unclean.
From the book of Sirach (this is one of 7 books removed from the original Old Testament by Martin Luther) we see that wine is permitted if used in moderation.
(Sirach 31:25-31) - Do not aim to be valiant over wine, for wine has destroyed many, Fire and water prove the temper of steel, so wine tests hearts in the strife of the proud. Wine is like life to men, if you drink it in moderation. What is life to a man who is without wine? It has been created to make men glad. Wine drunk in season and temperately is rejoicing of heart and gladness of soul. Wine drunk to excess is bitterness of soul, with provocation and stumbling. Drunkenness increases the anger of a fool to his injury, reducing his strength and adding wounds.
(Psalms 104:15) - and wine that maketh glad the heart of man.
(1 Tim 6:23) - Drink no longer water, but use a little wine for thy stomach's sake and thine often infirmities.
Paul says: do not get drunk with wine, for that is debauchery. (Paul does not say not to drink wine but not to get drunk with wine.)
(1 Tim 3:8, 3:3; Titus 1:7) - Likewise must the deacons be grave, not double-tongued, not given to much wine, not greedy of filthy lucre.
Now let us look at verses that concerning Jesus:
In Mt. 11:18-19 & Lk. 7:34 - For John came neither eating nor drinking, and they say, He hath a devil. The son of man came eating and drinking, and they say, Behold a man gluttonous, and a winebibber, a friend of publicans and sinners? (This statement would not make sense if Jesus were merely drinking un-aged wine or grape juice).
(Jn. 2:1-11) - The wedding feast of Canna - to summarize this passage, let us look at verse 10, where Jesus changes water into wine, because the wine has run out. (vs. 10) And saith unto him, Every man at the beginning doth set forth good wine; and when men have well drunk, then that which is worse: but thou has kept the good wine until now. What is Jn. 2:10 saying? That the normal procedure for a wedding is to have the "good" wine first, so that by the time this "good" wine is gone they can bring out the "not so good" wine because they will be less likely to notice the difference.Jesus drank wine.Grapes are harvested in the fall, and Passover (the time of the Last Supper) is in the spring. Without refrigeration, grapes (and grape juice) do not keep very well. Within a few days after the harvest, grapes begin to ferment and/or rot. The only methods of preservation available to the 1st century citizen were to extract the juice and let it ferment under somewhat controlled conditions (this is called wine making) or to dry the grapes which resulted in raisins. At the Last Supper Jesus said "I will not drink henceforth of this fruit of the vine" (Matthew 26:29, KJV). In those days they made wine from a number of different fruits but the wine of the grape, the "fruit of the vine," was alone used at Passover. Since this was spring, and the Passover liturgy called for all participants to drink four cups of wine, grape juice preserved by fermentation (wine) was most certainly used or at least one of the Gospel writers would have remarked about the departure from the natural; as they did so often about all His other miracles. The prescriptions for celebrating the Passover called for the cups of wine to be diluted with water. This was necessary because the fermentation process made it rather strong and also because the vessels they kept the wine in were somewhat porous and the wine tended to become thick with age as moisture escaped. This is the historical background behind why the priest adds a drop of water to the chalice during the Liturgy of the Eucharist. Wine not well protected from the air while it was stored became sour wine (vinegar).