“Being very merciful, God has promised a second repentance for those who fall into some transgression yet remain in the faith. In that manner, if anyone is tempted after his calling, and is overcome by force and fraud, he may still receive repentance.  But he must not turn away from that repentance.  ‘For if we sin willfully after we have received the knowledge of the truth, there remains no more sacrifice for sins.’ . . . But continual and successive repentings of sins does not differ at all from the case of those who have not believed at all.”