This verse tells of the two way street so to speak we have with the Lord . God isn’t fickle…He doesn’t change His mind, and He keeps all His promises. So we can have all confidence in Him that He will do what He says. That’s because God’s love & faithfulness is steadfast and true, and so our relationship with Him can be the same. And as we glory in His ever present light, we will find salvation, wisdom, and life.