Is a perfect example helpful for sinful humans? Yes, because it is possible to learn from a good teacher and his example.
(‏ مت ٢٤ :‏ ​ ٣٧ -‏ ٣٩ ؛‏ عب ٤ :‏ ١٥‏ )‏ لِنُجِبْ أَوَّلًا عَنْ هذَيْنِ ٱلسُّؤَالَيْنِ كَيْ نُدْرِكَ أَهَمِّيَّةَ ٱلسَّهَرِ وَمَدَى إِلْحَاحِهِ .‏