As I understand it, FAKE faith is the reason for the creator's dispensation of Jesus and "His spirit in the INNER man" (the age of eternity). In the O.T., God was REQUIRING our actions to be satisfactory to Him in order for us to enter His place of rest.
In the NEW testament, He declares us to be SONS OF HIS. We can only identify with Him as SONS by having His ETERNAL spirit (Hebrews 9:14) in us so that we can be ONE WITH HIM (Him in us and us in Him.....INTEGRAL WITH HIM).
Rom 1:17 For in it the righteousness of God is revealed through faith for faith; as it is written, "He who through faith is righteous shall live."