The essence of the definition of heaven is the presence of God. "Whom have I in heaven but You? And there is nothing on earth that I desire besides You" (Psalm 73:25). The kingdom of heaven is not primarily a place as much as it is being in the presence of the King of the kingdom of heaven. To be sure, this kingdom has space and place and food and drink and eternal pleasures. It is fit for the eternal, immortal, incorruptible habitation of Christ's people - body and soul. But it is heaven because of Christ's presence.
That is why it would be inaccurate to speak of the true bodily presence of the Lord of heaven where He has promised to be and not to acknowledge that here in the Sacrament is where heaven touches earth. This understanding of the Sacrament as "heaven on earth" is seen interwoven in the history of the Church through the centuries. Christians saw their worship as participating in the eternal worship of heaven.