As craxy is it sounds, JH, the reason that I knew it was the truth was because people were actually disciplined, and harshly because of wrongdoing, scripturally it was outlined and I was surprised that once I'd found this.
1st Corinthians 5:1-13
1 Actually fornication is reported among YOU , and such fornication as is not even among the nations, that a wife a certain [man] has of [his] father. 2 And are YOU puffed up, and did YOU not rather mourn, in order that the man that committed this deed should be taken away from YOUR midst? 3 I for one, although absent in body but present in spirit, have certainly judged already, as if I were present, the man who has worked in such a way as this, 4 that in the name of our Lord Jesus, when YOU are gathered together, also my spirit with the power of our Lord Jesus, 5 YOU hand such a man over to Satan for the destruction of the flesh, in order that the spirit may be saved in the day of the Lord.
6 Y OUR [cause for] boasting is not fine. Do YOU not know that a little leaven ferments the whole lump? 7 Clear away the old leaven, that YOU may be a new lump, according as YOU are free from ferment. For, indeed, Christ our passover has been sacrificed. 8 Consequently let us keep the festival, not with old leaven, neither with leaven of badness and wickedness, but with unfermented cakes of sincerity and truth.
9 In my letter I wrote YOU to quit mixing in company with fornicators, 10 not [meaning] entirely with the fornicators of this world or the greedy persons and extortioners or idolaters. Otherwise, YOU would actually have to get out of the world. 11 But now I am writing YOU to quit mixing in company with anyone called a brother that is a fornicator or a greedy person or an idolater or a reviler or a drunkard or an extortioner, not even eating with such a man. 12 For what do I have to do with judging those outside? Do YOU not judge those inside, 13 while God judges those outside? “Remove the wicked [man] from among yourselves.”
The scriptures which refer to the preaching work and how the end would never come until all would have an opportunity to hear it. Matthew 24:14 "...and this good news of the kingdom shall preached into every part of the inhabited Earth,and then the end will come. They were the only ones doing this.