When we begin to read chapter 84 of the book of Psalms, we see that the Psalmist David begins to mention how great and strong our God is, affirming that He is his longing.
It is good and wonderful to see David exalting God in this way, giving Him all glory and praise for the good that He is, declaring that He is the only almighty God.
Blessed are those who dwell in your house;
they are ever praising you.
Here we see that those who dwell in the house of God are blessed, because everything we have comes from Him, because He is the great, strong and powerful God, invincible and admirable.