When what you see makes you doubt?
Walk by faith, not by sight.
When what you hear makes you doubt?
Do not believe every spirit, but test the spirits, whether they are of God; because many false prophets have gone out into the world.
When your thoughts cause you to doubt?
Cast down arguments and every high thing that exalts itself against the knowledge of God, bringing every thought into captivity to the obedience of Christ, and being ready to punish all disobedience when your obedience is fulfilled.
When the thing you say, makes you doubt?
Look also at ships: although they are so large and are driven by fierce winds, they are turned by a very small rudder wherever the pilot desires.
When you are tempted to doubt by your senses or thoughts?
Take control!