In most Christian churches, part of the religious ceremonies is a communion of bread and wine (water or fruit juice in some cases).  Most of these churches consider the bread and wine as symbols of the body and blood of Christ.  This is nor all it symbolizes though.  When Jesus said in the Lord's Prayer, "give us this day our daily bread", or to be more correct, "give us this day the bread of the morrow", he wasn't talking about ordinary bread, nor was he talking about himself.  In this reference, the bread is a symbol of God's Grace, God's Light, which nourishes the soul rather than the body.   
     Numerologist say bread and wine together symbolizes regeneration or rebirth and that is what God's Light is all about: Awakening the slumbering soul and nourishing it so it will grow.
    Wine is considered sacred, not only in the Christian faith, but in many other religions also. In the ancient religion of the Zoroastrians Jam-i Jamshed, the bowl of wine from which Jamshed drank deep, is a historical fact. Among the Hindus, Shiva considered wine sacred, and in Islam, though wine is forbidden on earth, yet in heaven it is allowed.  Jesus also said he would drink wine in Heaven.  So are there vineyards and wine cellars in Heaven?  I don't think so.  This is obviously symbolic wine.  Wine is considered a symbol of the soul's evolution.  The soul being reborn is like the grape juice becoming wine.  Teetotalers might not like that interpretation, but the point of it is that grapes and grape juice doesn't last long but wine does so the wine symbolizes the immortal soul.  To a Sufi, the goal is to change from a grape-life (materialistic) to a wine-life (spiritual, enlightened).