Matthew Poole and continuators on John 14:2

2 In my Fathers house are many mansions ; if it were not so, I would have told you: I go to prepare a place for you .

Our Lord's first Argument brought to comfort them from the place whither he was going, and the end of his going thither; the place whither he was going, was his Fathers house, so as they needed not to be troubled for him, he was but going home; nor was God his Father onely, but theirs also, as he afterwards saith, I go to my Father, and your Father; and here he tells them, that in his Fathers house there was not onely a mansion that is, an abiding place for him, but for many others also. Our days on the Earth (saith David) 1 Chron. 29.15. are as a shadow, and there is no abiding; but in Heaven there are [non-Latin text not transcribed], abiding places. We shall (saith the Apostle) be ever with the Lord: and the Mansions there, are many; there is room enough for all believers. I would not have deceived you; if there had been no place in heaven but for me, I would have told you of it; but there are many Mansions there.

I go to prepare a place for you. The place was prepared of old; those who shall be saved, were of old ordained unto life. That Kingdom was prepared for them before the foundation of the world (that is, in the counsels and immutable purpose of God) These Mansions for believers in Heaven, were to be sprinkled with blood: The sprinkling of the Tabernacle, and all the Vessels of the Ministry, were typical of it, Heb. 9.21, 22, 23. but the heavenly things themselves, with better sacrifices than these, saith the Apostle. By his Resurrection from the dead, and becoming the First Fruits of those that sleep; by his Ascension into Heaven, as our forerunner, Heb. 6.20. by his sitting at the right hand of God, and making intercession for us, he prepareth for us a place in Heaven. And thus he comforteth his Disciples (as to the want of his bodily presence), as from the consideration of the place whither he went, so from the end of his motion, which was to do those acts which were necessary in order to his Disciples inheriting those Blessed Mansions which were prepared for them from before the foundation of the world.