God is at work in all the circumstances of your life to bring out the good for you, even if you had never heard of Romans 8:28. His work is not dependent upon your faith. But the comfort and joy that statement is intended to give you is dependent upon your believing it, upon your trusting in Him who is at work, even though you cannot see the outcome of that work.
Jerry BridgesOur duty is found in the revealed will of God in the Scriptures. Our trust must be in the sovereign will of God as He works in the ordinary circumstances of our daily lives for our good and His glory.
Jerry Bridges