Much of this psalm reminds me of when God looked upon the world during Noah's time.  Who was longing after Him? Only Noah.  God was faithful to Noah and I think David is calling upon the faithfulness of God for His people Israel in this psalm.  David sees the chaos, sin, and struggle of a people moving without the power of God on their lives and he is broken by this.  He sees the foolishness of their struggle for power and dominion.  What good is that without God?

Though all of this is going on David reminds himself that God is present with the righteous.  God is faithful to the righteous just like in days of Noah.  David needs this reminder in the midst of such a chaotic and callused world.  He longs for the salvation only God can bring His people.  The flame/presence of God is with us just as it was with Noah and David.  Do you need to be reminded of that today?