The text is a plain sentence; 'tis therefore needless to press any doctrine in other words from it: so that I shall build my discourse on the words of the text. There are two propositions contained in the words, viz., I, that heaven is God's house, and II, that in this house of God there are many mansions.
Prop. I. Heaven is God's house. An house of public worship is an house where God's people meet from time to time to attend on God's ordinances, and that is set apart for that and is called God's house. The temple of Solomon was called God's house. God was represented as dwelling there. There he had his throne in the holy of holies, even the mercy-seat over the ark and between the cherubims.
Sometimes the whole universe is represented in Scripture as God's house, built with various stories one above another: Amos ix. 6, "It is he that buildeth his stories in the heaven;" and Ps. civ. 3, "Who layeth the beams of his chambers in the waters." But the highest heaven is especially represented in Scripture as the house of God. As to other parts of the creation, God hath appointed them to inferior uses; but this part he has reserved for himself for his own abode. We are told that the heavens are the Lord's, but the earth he hath given to the sons of men. God, though he is everywhere present, is represented both in Old Testament and New as being in heaven in a special and peculiar manner. Heaven is the temple of God. Thus we read of God's temple in heaven, Rev. xv. 5. Solomon's temple was a type of heaven; it was made exceeding magnificent and, costly partly to that end, that it might be the most lively type of heaven. The apostle Paul in his epistle to the Hebrews does from time to time call heaven the holy of holies, as being the antitype not only of the temple of Solomon, but of the most holy place in that temple, which was the place of God's most immediate residence: Heb. ix. 12, "He entered in once into the holy place;" verse 24, "For Christ is not entered into the holy places made with hands, which are the figures of the true, but into heaven itself." Houses where assemblies of Christians worship God are in some respects figures of this house of God above. When God is worshipped in them in spirit and truth, they become the outworks of heaven and as it were its gates. As in houses of public worship here there are assemblies of Christians meeting to worship God, so in heaven there is a glorious assembly, or Church, continually worshipping God: Heb. xii. 22, 23, "But ye are come unto mount Sion, [and unto] the city of the living God, the heavenly Jerusalem, and to an innumerable company of angels, to the general assembly and church of the firstborn, that are written in heaven."