They knew that sheep need care and attention in order to thrive. In a spiritual sense, it is the same with people.
بِشَكْلٍ مُمَاثِلٍ ،‏ يَحْتَاجُ ٱلْبَشَرُ إِلَى ٱلرِّعَايَةِ وَٱلِٱهْتِمَامِ مِنْ يَهْوَهَ .‏