Whoa! David actually manages to stay humble for 3 whole verses.
David swears not to rest until he finds a suitable dwelling place for god, then quickly decides to put the ark of the covenant on Ephratah before he can, you know, get sleep-deprived or anything. He reminds god about how he promised to keep his family on the throne as long as they kept the covenant and promises to feed the poor in return. I find myself hugging democracy.
Brotherly unity (or a unified Israel, depending who you want to believe) is like the anointing oil that ran down Aaron's head, into his beard, and down his garments. Yuck.
If you were to take a drink every time you see the word bless, you'd be drunk by the time you finished this psalm, even though it's only 3 verses.
God does whatever he wants, which mostly consists of natural disasters and smiting people and giving their land to Israel. Oh, and heathen idols suck and Aaron's family rules.