Psalm 27

The begining and end of this psalm presents a message about God and the words in between fill out the truth presented. David began his song with words that recognize who God is; light, salvation, and stronghold. In this life these 3 represent mechanisms that remove fear. That is why David twice declare his absence of fear. In the God of Israel the anxieties from darkness, being lost, and vulnerability are all taken away. David ends his song with one wise instruction for those who have allowed God to take away their fears; wait on the LORD.
It took me about 3 minutes to read through this psalm.
Stuart