The substance of faith was written as a form of encouragement to believers to keep their faith going even if things seem so hard, and not to give up on any circumstances. Acting in good faith could produce an extraordinary good result. Faith is having strong confidence and believing that something will surely happen without seeing it yet. Divine health is given by God through faith. The sick would be healed completely just by having faith in the healing power of God. And we can only believe before we receive this precious gift.