I should have added this. I think this answers your quest, if I understand it correctly.
*** w09 6/15 p. 24 par. 16 The Faithful Steward and Its Governing Body ***
16 Are all these anointed ones throughout the earth part of a global network that is somehow involved in revealing new spiritual truths? No. Although as a composite body the slave class is responsible for feeding the spiritual household, not all individuals of the slave class have the same responsibilities or work assignments. (Read 1 Corinthians 12:14-18.) As noted earlier, in the first century, all were involved in the vital preaching work. But only a very limited number were used to write the books of the Bible and oversee the Christian congregation