I remember traveling to a new congregation in Germany on one of my trips, I never visited the church before so I was just curious and observing everything. When I came in and greeted a few brothers, one brother came right across the room, embraced me.
Afterwards we had great fellowship, he heard of me and knew I ran SermonIndex and was happy to have Christian Fellowship. A holy kiss is a embrace to show we have love for each other as the body of Christ. It was a wonderful experience when in a strange church you all of a sudden had such a welcoming embrace.
We are the family of God together that will be in the eternal heavens, think of that when you greet a brother or sister next time!