In the publication, The Nations Shall Know That I Am Jehovah-How? (WTB&TS 1971) page 61 it asks the question 'Whom could the real "chariot of Jehovah's organization roll up to and confront that He might bestow upon this qualified one the commission to speak as a prophet in the name of Jehovah?'
and it appears on page 66. to be not Christendom but 'the anointed proclaimers of the heavenly kingdom of God... commissioned to speak to all the nations in His name.'
On the previous page it tells me.
"They recognized the real kingdom of God had been established in the hands of Jesus Christ in 1914, and now more vigorously than ever they undertook to preach it 'in all the inhabited earth for a witness to all the nations.' They did so with the additional help of The Golden Age (now the magazine Awake)"
As the Watchtower I quoted from in 1968 shows them to be doing this in 197 lands and islands. The Awake magazine on the inside front cover at one point carried this as to why it was published.
,Most importantly, 'Awake' builds confidence in the Creator's promise of a peaceful and secure new order within our generation.,
In the book "Man's Salvation Out Of World Distress At Hand" (WTB&TS 1975) on page 29 it says.
"After all that we have gone through since 1914, our generation would be, of all generations the "most to be pitied".Think of it, though! Worthy ones of this generation of mankind will be saved alive out of the rest of this world distress so as to survive the worst of it and enter into God's Messianic new system of things and not need a resurrection from the dead to life on earth! This is a valid hope well founded on what was said by Jesus Christ..."
This is referring to 1 Corinthians 15:18,19 where the apostle Paul is talking about the resurrection of Jesus and it therefore tied to this from (Man's Salvation Out Of World Distress At Hand. (1975,WTBTS page 48)
'The glorification of Jesus Christ in heaven after his extraordinary sufferings as a man on earth was good news, Gospel, Evangel. “Nevertheless,” writes the apostle Paul with special reference to his own people , “they did not all obey the good news. For Isaiah says: ‘Jehovah, who put faith in the thing heard from us?” So faith follows the thing heard, In turn the thing heard is through the word about Christ” –Romans 10:16,17'
His resurrection and glorification was good news.
The reason I am showing this is to show that this 'They proclaim the good news that the millennial rule of Christ will begin with this generation' was part of the good news and when Paul says this at Romans 10
Nevertheless, they did not all obey the good news. For Isaiah says: “Jehovah who has put faith in the thing heard from us?17 So faith follows the thing heard (NWT)
and Man's Salvation Out Of World Distress At Hand. 1975,WTBTSpage 48 says this
'In the face of the relatively small proportion of the world’s population that has put faith in the “thing heard” from us or proclaimed by us, it can truthfully be said: “They did not all obey the good news.”'
and the good news is from God it wasn't something that was just in the mind,
As the generation teaching was linked to the resurrection teaching of Christ here"Man's Salvation Out Of World Distress At Hand" (WTB&TS 1975) on page 29 to me it would be as if Paul after saying what he said in 1Cor. 15 later changed his teaching, if the generation teaching was changed and it wasn't shown to be true, but Paul says in 1Cor. 15:13-15
13 if, indeed, there is no resurrection of the dead, then Christ has not been raised up. 14 But if Christ has not been raised up, our preaching is certainly in vain, and your faith is also in vain. Moreover, we are also found to be false witnesses of God, because we have given witness against God by saying that he raised up the Christ,.. (NWT)
For me it calls into question whether they were commissioned in 1919 and I believe one of the first things they had was a campaign Millions now living will never die my grandfather was alive at that time and lived a long life and died of old age related problems almost 40 years ago.
Isa1961 we can all imagine a lot of things in our mind but having faith in what God's mouthpiece is saying is different.