Matthew Henry Commentary 2 Chronicles 5:11-14

"And it came to pass, when the priests were come out of the holy place, (for all the priests that were present had sanctified themselves, and did not keep their courses; also the Levites who were the singers, all of them, even Asaph, Heman, Jeduthun, and their sons and their brethren, arrayed in fine linen, with cymbals and psalteries and harps, stood at the east end of the altar, and with them a hundred and twenty priests sounding with trumpets;) it came to pass, when the trumpeters and singers were as one, to make one sound to be heard in praising and thanking Jehovah; and when they lifted up their voice with the trumpets and cymbals and instruments of music, and praised Jehovah, [saying], For he is good; for his lovingkindness [endureth] for ever; that then the house was filled with a cloud, even the house of Jehovah, so that the priests could not stand to minister by reason of the cloud: for the glory of Jehovah filled the house of God." — 2 Chronicles 5:11-14 (ASV)

God took possession of the temple; he filled it with a cloud. In this way he signified his acceptance of this temple, to be the same to him as the tabernacle of Moses was, and assured his people that he would be the same in it. If we would have God dwell in our hearts, we must leave room for him; everything else must give way. The Word was made flesh; and when he comes to his temple, like a refiner's fire, who may abide the day of his coming? May he prepare us for that day.