2 Corinthians 13:12

Then to lead them on unto it, he says, "Salute one another with a holy kiss." What is "holy?" not hollow, not treacherous, like the kiss which Judas gave to Christ. For therefore is the kiss given, that it may be fuel unto love, that it may kindle the disposition, that we may so love each other, as brothers brothers, as children parents, as parents children; yea, rather even far more. For those things are a disposition implanted by nature, but these by spiritual grace. Thus our souls bound unto each other.

And therefore when we return after an absence we kiss each other, our souls hastening unto mutual intercourse. For this is that member which most of all declares to us the workings of the soul. But about this holy kiss somewhat else may yet be said. To what effect? We are the temple of Christ; we kiss then the porch and entrance of the temple when we kiss each other. See ye not how many kiss even the porch of this temple, some stooping down, others grasping it with their hand, and putting their hand to their mouth.

And through these gates and doors Christ both had entered into us, and doth enter, whensoever we communicate. Ye who partake of the mysteries understand what I say. For it is in no common manner that our lips are honored, when they receive the Lord's Body. It is for this reason chiefly that we here kiss. Let them give ear who speak filthy things, who utter railing, and let them shudder to think what that mouth is they dishonor; let those give ear who kiss obscenely.

Hear what things God hath proclaimed by thy mouth, and keep it undefiled. He hath discoursed of the life to come, of the resurrection, of immortality, that death is not death, of those other innumerable mysteries. For he that is about to be initiated comes to the priest's mouth as it were an oracle, to hear things full of awe. For he lost his life even from his forefathers, and comes to seek it again, and to ask how he may haply find and get it back. Then God announceth to him how it may be found, and that mouth becomes more awful than the very mercy-seat. For that mercy-seat never sent forth a voice like this, but spake much of lesser things, of wars and such peace as is here below: but this speaks all about heaven and the life to come, and things new and that pass understanding.