True happiness isn't found in following the crowd or embracing the values of the world, but in a deliberate separation from them. This psalm opens with a beautiful picture of the person who finds joy and sustenance in the law of the Lord. Like a tree planted by streams of water, this person is stable, nourished, and able to bear fruit in every season of life. Their consistent devotion to God’s Word ensures that whatever they do will prosper and that their roots will go deep, leading to a life of true and lasting blessedness.