Yes, they need a conviction that is so strong that it moves them to dedicate themselves to Jehovah and to serve him wholeheartedly.
فَٱتَّكِلْ عَلَى كَلِمَةِ يَهْوَهَ وَرُوحِهِ وَٱبْذُلْ كُلَّ جُهْدِكَ كَيْ يَصِيرَ وَلَدُكَ « حَكِيمًا لِلْخَلَاصِ » .‏