Many people like to quote verse 10 of this psalm, “Be still and know that I am God.” But often people think that being “still” has to do with stopping activity and being quiet. There are certainly times to stop other activities and be quiet in order to focus on God, but that is not what this psalm is talking about.
The context of this psalm is war, and probably came out of one of the many times that God supernaturally delivered His people from their enemies. The exhortation is not to escape the noise and upheaval that often characterize our life, but to stop trying to win the battle on our own, and let God show His power to deliver us in the midst of all the noise and upheaval.
From the point of view of the historian, this chapter is about a political/military conflict between two kingdoms, Judah and Assyria. But to us as believers, it is all about what God or gods we follow. Who truly has power, and deserves to be exalted over all others? And what happens to those who defy and disparage the one true God?