Summary: The psalmist paints a picture of God as almost a natural disaster, clearing His path off the holy mountain. God doesn't want empty sacrifices, He says; He wants a real change in people's hearts, from fear and obligation to joy and gratefulness.
Response: (Asaph, our psalmist, was probably a singer for the Temple?)
(Holy crap, fifty psalms! A third of the way in, I can't say I'm impressed with all of them, but I've enjoyed digging deeper and getting some real treasures.)
I say natural disaster because it talks about God carving out trees and a burning fire on His way down the mountain. As it says, He isn't hiding.
And His judgement comes with a plan forward or at least an alternative. I can only pray I make such an attitude adjustment.