Contradiction with Proverbs 22:3
While Isaiah 21:8 speaks of diligent watchmen, Proverbs 22:3 emphasizes foresight and prudence, suggesting that hiding from danger is wise, which contrasts with the active vigilance in Isaiah.
Proverbs 22:3: A prudent [man] foreseeth the evil, and hideth himself: but the simple pass on, and are punished.
Contradiction with Matthew 26:40-41
The watchmen in Isaiah 21:8 are vigilant, whereas in Matthew, the disciples fail to keep watch and fall asleep, highlighting human frailty.
Matthew 26:40-41: Watch and pray, that ye enter not into temptation: the spirit indeed [is] willing, but the flesh [is] weak.
Contradiction with Ezekiel 3:17
Isaiah 21:8 involves watching for immediate danger, but Ezekiel portrays a watchman tasked with warning people spiritually, showing a different kind of vigilance.
Ezekiel 3:17: Son of man, I have made thee a watchman unto the house of Israel: therefore hear the word at my mouth, and give them warning from me.
Contradiction with Jonah 3:4-5
Isaiah's watchman is looking for physical threats, while Jonah’s warning leads to repentance, contrasting physical and spiritual preparedness.
Jonah 3:4-5: And Jonah began to enter into the city a day's journey, and he cried, and said, Yet forty days, and Nineveh shall be overthrown.
Contradiction with Luke 12:39
In Isaiah 21:8, the watchman is aware, but Luke warns that without vigilance, unexpected events can happen, presenting a scenario of being caught off guard.
Luke 12:39: And this know, that if the goodman of the house had known what hour the thief would come, he would have watched, and not have suffered his house to be broken through.