In that way you teach him to think in terms of Bible principles. For example, suppose you ask a brother to keep the entranceway to the Kingdom Hall clean in appearance and safe for walking.
اِشْرَحْ لِلتِّلْمِيذِ أَنَّ ٱلْمَطْلُوبَ مِنْهُ لَهُ أَسَاسٌ فِي ٱلْكِتَابِ ٱلْمُقَدَّسِ ،‏ وَهٰكَذَا يَتَعَلَّمُ أَنْ يَدَعَ ٱلْمَبَادِئَ تُوَجِّهُهُ لَا ٱلْقَوَاعِدَ فَحَسْبُ .‏