WT 1981 11/15 p21
"18 We can expect a similar expansion of our preaching activity now, at this climax of the ages. No doubt, before the “great tribulation” is finished, we will see the greatest witness to God’s name and kingdom in the history of this world. And while now the witness yet includes the invitation to come to Jehovah’s organization for salvation, the time no doubt will come when the message takes on a harder tone, like a “great war cry.” Revelation 16:21 shows that “a great hail with every stone about the weight of a talent [nearly 100 pounds] descended out of heaven upon the men, and the men blasphemed God due to the plague of hail, because the plague of it was unusually great.” Hailstones are frozen, hardened water. So this pictures how, at the end, Jehovah’s judgment message sent down upon disobedient mankind will be like a barrage of hard-hitting hail. The fact that the plague of hailstones is spoken of as being “unusually great” suggests that at the very end there will be a hard proclamation of Jehovah’s “day of vengeance” by Jehovah’s servants.
19 So, then, we do well to say, as Peter did, “Since all these things are thus to be dissolved, what sort of persons ought you to be in holy acts of conduct and deeds of godly devotion”! (2 Pet. 3:11) Surely, we need to “keep comforting one another and building one another up.” We should “always pursue what is good toward one another.” (1 Thess. 5:11, 15) “Really, then, as long as we have time favorable for it, let us work what is good toward all, but especially toward those related to us in the faith.” (Gal. 6:10) To this end, do not fail to ‘stay awake and keep your senses.’—1 Thess. 5:6."
I noted also the earlier paragraph in the same article "Stay Awake and Keep Your Senses" (pages 16/17 same issue)
3Any person who wants to survive into God’s righteous new order urgently needs to come into a right relationship with Jehovah and His earthly organization now. “The name of Jehovah is a strong tower. Into it the righteous runs and is given protection.” (Prov. 18:10) “It must occur in the final part of the days that the mountain of the house of Jehovah will become firmly established above the top of the mountains, and it will certainly be lifted up above the hills; and to it all the nations must stream.” (Isa. 2:2) Yes, any people of the nations who want to live in God’s paradisaic new order must now stream to Jehovah’s mountain, his true worship, which is firmly established and is exalted high above any other type of worship.
4 Why is there such an urgency about coming to Jehovah’s true worship now? Could not a sincere person wait until he actually sees Jehovah’s executional judgments beginning, and then quickly come over to His side? While that might sound appealing to some, would there then be enough time to build the right relationship with Jehovah? The evidence from the Scriptures answers, No. Jesus warned: “Pay attention to yourselves that your hearts never become weighed down with overeating and heavy drinking and anxieties of life, and suddenly that day be instantly upon you as a snare. For it will come in upon all those dwelling upon the face of all the earth.” (Luke 21:34, 35) Note that those who are not awake spiritually are caught unawares, for that “day” comes upon them “