Charles H. Spurgeon on Psalms 84:4

Blessed are they that dwell in thy house, etc. Blessed indeed, we too may exclaim, and blessed shall they be for ever. They are dwellers, not visitors, in God's house. I will dwell in the house of the Lord for ever. This is true, blessedly true, of all who trust in Jesus now. But though God's children are all priests by birth, as were the sons of Aaron, they are not all, alas! priests by consecration. (See Exodus 29.) Comparatively few know their priestly place at the golden altar. Many of them are doubting as to whether their sins, root and branch, were all consumed outside the camp; and, consequently, such are afraid to come within the court, and as for being assured of their full justification and sanctification in the risen One, they gravely doubt and fear that such blessedness can ever be their happy lot. Hence that state of soul which answers to priestly consecration at the laver, and happy worship at the golden altar, is unknown and unenjoyed. They are not priests by consecration.

Our text is plain. They will still be praising thee. Doubts, fears, unsettled questions, all are gone. Such cannot exist in the holy place. All, of course, who are in Christ, must be in God's account where he is; but all who believe in Christ, do not know and believe that they are in him, as being one with him now. When the state of our souls answers to what is symbolized by the holy place, we can only praise: They that dwell in thy house will be still praising thee. Then we are happily near to God, and have communion with him, in the glorified Christ, through the power of the Holy Ghost. Things New and Old.