The July 15, 2013, issue of The Watchtower explained that “the faithful and discreet slave ” is a small group of anointed brothers who make up the Governing Body.
وَهٰكَذَا تَفَرَّغَتِ ٱلْهَيْئَةُ ٱلْحَاكِمَةُ لِتَزْوِيدِ ٱلْإِرْشَادِ وَٱلطَّعَامِ ٱلرُّوحِيِّ .‏