19, 20. (a) What may help those who have fallen into sin to muster up the courage to return to Jehovah?
خُذْ عَلَى سَبِيلِ ٱلْمِثَالِ مَا حَدَثَ مَعَ مَارْيُو * ٱلَّذِي يَعِيشُ فِي ٱلْوِلَايَاتِ ٱلْمُتَّحِدَةِ .‏