Is the Watchtower Society and Watchtower literature essential for salvation according to Jehovah's Witnesses?
II Timothy 3:15–17 that tells us that the word is sufficient for salvation and holiness, that the man of God might be perfect, thoroughly furnished for good works?
People became Christians, i.e., were justified and lived holy lives long before the Watchtower Society came on the scene. Do Witnesses think people can still be justified today and live Holy lives having and following the Bible.. without ever seeing any Watchtower literature?
If not, at what point in time did the Bible become insufficient for salvation and holy living?