"who satisfies you with good so that your youth is renewed like the eagle's.
David isn't asking "who?" he's instructing us that God alone satisfies our soul. It’s His favor and grace that gives delight in the recesses of our being; He satisfies so deeply that spiritual joy is evident even in challenging circumstances. When our soul is satisfied our mouth will be filled with His praise. True joy.
Among many things, the eagle represents strength. Here David is alluding to restoration, look at the word picture in Isaiah 40:30-31
"Even the youths will become weak and tired, and young men will fall in exhaustion. But those who trust in the LORD will find new strength. They will soar high on wings like eagles. They will run and not grow weary. They will walk and not faint"
Think about it this way: God fills the soul, our mouth worships Him, our countenance and altitude is revived. When passion and fire is returned to our soul then we become strong enough to plow through our place of pain with rejoicing!
Thank you for taking the Psalms 103 devotional journey with me. Next week we'll look at Ps. 103:6