To understand what displaying good manners entails, consider the examples of Jehovah God and his Son.
لِنَتَأَمَّلْ أَوَّلًا فِي مِثَالِ يَهْوَه ٱللهِ وَٱبْنِهِ ،‏ وَهُوَ خَيْرُ مُسَاعِدٍ عَلَى فَهْمِ مَا يَعْنِيهِ ٱلِٱتِّصَافُ بِٱلْآدَابِ ٱلْحَسَنَةِ .‏