The Lord provides peace for us because of his protection of us. He is our provision of peace and the follower of the Shepherd always wins. If you are stuck on you, it ruins you, but you can trust in Him. There couldn't been any greater contridiction between Psalm 23 and Sinatra's "My Way". Are you doing things your way or by relying on your Shepherd?
Scripture References: Psalms 23 , Luke 12 , Matthew 6 , Philippians 4