The WT has been getting a bit more careful with how they phrase this in their publications lately. But they still do from time to time.
WT 2002 DEC 1 pg. 17 par.17 "Enjoy Personal Study of God?s Word"
The Ethiopian eunuch was a convert to Judaism. He was a sincere believer in God, and he studied the Scriptures. Traveling in his chariot, he was reading the text of Isaiah when Philip ran alongside him and asked: "Do you actually know what you are reading?" How did the eunuch answer?"?Really, how could I ever do so, unless someone guided me?? And he entreated Philip to get on and sit down with him." Then Philip, directed by holy spirit, helped the eunuch to understand the prophecy of Isaiah. (Acts 8:27-35) What does this illustrate? That our private reading of the Bible is not enough. Jehovah, by his spirit, uses the faithful and discreet slave class to help us to understand his Word at the right time. How is this done?