Hi,
I am reading Revelation It's Grand Climax At Hand! published by The Watchtower Society and found these observations on page 165:
"Similarly, Christendom's leaders defied the Bible Students, saying that these had never graduated from theological colleges. But God's witnesses had higher credentials as ministers: those meek persons who heeded their Scriptural message. ( 2 Corinthians 3:2,3) In 1917 the Bible Students published The Finished Mystery, a powerful commentary on Revelation and Ezekiel."
AAF