It symbolizes your dedication ​ — a solemn promise you make to Jehovah that you will serve him forever by putting his will above everything else in your life.
هٰذَا أَعْظَمُ ٱمْتِيَازٍ يُمْكِنُ أَنْ يَحْصُلَ عَلَيْهِ إِنْسَانٌ .‏