Just copied this 1973 Watchtower statement (uninspired of course), from jw facts
"Consider, too, the fact that Jehovah's organization alone, in all the earth, is directed by God's holy spirit or active force. (Zech. 4:6) Only this organization functions for Jehovah's purpose and to his praise. To it alone God's Sacred Word, the Bible, is not a sealed book. Many persons of the world are very intelligent, capable of understanding complex matters. They can read the Holy Scriptures, but they cannot understand their deep meaning. Yet God's people can comprehend such spiritual things. Why? Not because of special intelligence on their part, but as the apostle Paul declared: "For it is to us God has revealed them through his spirit, for the spirit searches into all things, even the deep things of God."" Watchtower 1973 Jul 1 p.402