John MacArthur also teaches the serious false doctrine of “once saved always saved.” He’s a major false teacher leading many astray, including many pastors.

This passage in Hebrews 6 is probably directly related. The Hebrews were facing martyrdom, which they could escape if they publicly renounced Christ. The writer to Hebrews plainly says this is unpardonable.

Hebrews 6:4 For concerning those who were once enlightened and tasted of the heavenly gift, and were made partakers of the Holy Spirit, 5 and tasted the good word of God and the powers of the age to come, 6 and then fell away, it is impossible to renew them again to repentance; seeing they crucify the Son of God for themselves again, and put him to open shame.

Revelation 14:

9 Another angel, a third, followed them, saying with a great voice, “If anyone worships the beast and his image, and receives a mark on his forehead, or on his hand, 10 he also will drink of the wine of the wrath of God, which is prepared unmixed in the cup of his anger. He will be tormented with fire and sulfur in the presence of the holy angels, and in the presence of the Lamb. 11 The smoke of their torment goes up forever and ever. They have no rest day and night, those who worship the beast and his image, and whoever receives the mark of his name.

We need to be ready to lose our heads. Taking the Mark is NOT an option!

John Elving writes under this video:

John MacArthur & Phil Johnson teach that by taking the Mark of the Beast you can still repent and go to heaven. The reasoning behind this is it is not an unforgivable sin. I reject this theory 100% because the bible teaches us that once you take the Mark of the beast you are sealed with the seal of satan and you will never repent.