Yes, the lord is in us, because we are his temple, because he dwells in us as I Cor 3:16 says, though I would have to disagree with love these are rooms because we are told they are mansions, and we shut the doors Isa 26:20
I believe this is a two part thing, not just one that is being spoken about. we are the temple of God now as he is in us but yet there is these rooms bring prepared for us as John relates this same event to us as Isaiah spoke of...I will have to stay with this being both of these things.
In Christ's love
Vickie