The less faith, still the more fear.
Fear is generated by unbelief, and unbelief strengthened by fear.
As in nature there is an observable circular generation, vapors beget showers, and showers new vapors, so it is in things moral, and therefore all the skill in the world can never cure us of the disease of fear till God first cures us of our unbelief. Christ therefore took the right method to rid his disciples of their fear by rebuking their unbelief. Unbelief weakens and stumbles the assenting act of faith, and thereby cuts off from the soul, in a great measure, its principal relief against dangers and troubles. It is the use and office of faith to realize to the soul the invisible things of the world to come, and thereby encourage it against the fears and dangers of the present world. Thus Moses forsook Egypt, not fearing the wrath of the king, for he endured, as seeing him that is invisible.