A cloud of incense was rising on high; the people suddenly all bowed low; what could it mean? The truth flashed on him, fearfully yet sweetly; it was the Blessed Sacrament - it was the Lord Incarnate who was on the altar, who had come to visit and bless his people. It was the Great Presence, which makes a Catholic Church different from every other place in the world; which makes it, as no other place can be - holy.