Our earthly fathers are supposed to protect, defend and provide for their families. However, they are only humans with many flaws. Some of us have never had one to look up to. God is reminding us that whether or not our fathers succeeded or failed in fulfilling the expectation set before them, God will always be our ultimate Father who will defend, protect, and provide for our needs.
We may have broken relationships with our fathers or live in a dysfunctional family. God wants to remind those of us in such circumstances that you too shall lack nothing as long you realize that He is your Father. (Psalm 68:5) His perfect love towards you remains unchanging. He’s waiting for you to finally notice Him, and be delighted by Him. In Him you shall lack no good thing.