Psalms 122:9 - Albert Barnes' Notes on the Bible

Because of the house of the Lord our God I will seek thy good - Because of the sanctuary within thee; because that is the place where God is worshipped. The principal attraction in thee is the fact that in thee is the place where the worship of God is celebrated. It is this which gives its main importance in my view to the place; it is for this, and because I desire its influence to be perpetuated and extended, that I seek thy prosperity. This expresses a deep feeling in the mind of a pious man. To him the church of God is the most important of all objects, gives the principal interest to a place, and is everywhere to him the chief attraction. The church does more to adorn a place than anything else; it is that which exerts the best influence on a place, and sends the best influence abroad; it is that which to him is the source of chief comfort and delight. His heart is there; his main delight is there; his arrangements will be made so as best to enjoy the privileges of the sanctuary; and his plans of life will all contemplate the welfare, the extension, and the influence of the church of God. It is religion which in his view is the chief ornament of a place; religion which in any community is the principal fountain of its happiness and prosperity; religion which is the central and controlling influence on the private dwellings, and the public institutions, of a nation.