During those times, you can either choose to believe Him at His word and grow stronger in your faith. Or, you can allow the circumstances, (which is much easier to see with your natural eyes) to become more powerful than your faith in Him for the unseen promises.
It's not always easy to do but with Him leading you, you can absolutely walk by faith and not by sight. The trials and contradictions to His promises are merely temporary, and everything which is temporary proves itself to be exactly that....merely temporary. Then, you will see your breakthrough by the hand of the Lord - SUDDENLY!