So, although there are a million reasons to become inactive, how can our conscience allow us not to become active in the work described at Matt. 24:14? I know there are many possibilities.
I understood the preaching we were engaged in related to Revelation 14:7. Good news and a judgment message.
The Watchtower March 15 1970.Pg. 174
The present-day “good News” concerning God's kingdom is that it has been established in heaven in this very generation; yes, that Jesus Christ has been enthroned there and is ruling in the midst of his enemies. This means that Satan the Devil has been cast from heaven to the vicinity of the earth, and that he will soon be abyssed and his entire wicked system of things destroyed. What good news.
So when I felt I was no longer convinced of this my conscience would not allow me to join as a witness in preaching it.