True, the preaching work plays a vital role in the salvation of honesthearted ones, but it also serves other important purposes.
فَٱلْخِدْمَةُ ٱلْمَسِيحِيَّةُ تُتِيحُ لَنَا ٱلْفُرْصَةَ لِلْبُرْهَانِ عَنْ مَحَبَّتِنَا لِيَهْوَه .‏