What do you think it'll be? Will it be strong enough to persuade believers?
The scripture concerning strong delusion:
2 Thessalonians 2:8-12 And then shall that Wicked be revealed, whom the Lord shall consume with the spirit of his mouth, and shall destroy with the brightness of his coming: Even him, whose coming is after the working of Satan with all power and signs and lying wonders, And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved. And for this cause God shall send them strong delusion, that they should believe a lie: That they all might be damned who believed not the truth, but had pleasure in unrighteousness.
What is the lie? The opposite of the truth. The love of darkness. What is the truth? The testimony of Jesus, which cannot be separated from the law of God. Do we love the truth? Do we believe the truth? Are we
doers of the truth?
John 1:17 For the law was given by Moses, but grace and truth came by Jesus Christ.
John 3:19-21 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil [sin]. For every one that doeth evil [sin] hateth the light, neither cometh to the light, lest his deeds should be reproved. But he that doeth truth [obedience] cometh to the light, that his deeds may be made manifest, that they are wrought in God.
Malachi 2:6 The law of truth was in his mouth, and iniquity was not found in his lips: he walked with me in peace and equity, and did turn many away from iniquity.
Romans 2:17-20 Behold, thou art called a Jew, and restest in the law, and makest thy boast of God, And knowest his will, and approvest the things that are more excellent, being instructed out of the law; And art confident that thou thyself art a guide of the blind, a light of them which are in darkness, An instructor of the foolish, a teacher of babes, which hast the form of knowledge and of the truth in the law.
The love of darkness (sin), the denial of the truth in the law of God and in the testimony of Jesus. It not only affects the majority of the population of the earth, but it is at large in the church as well. Will it get stronger the closer we get to the end? Yes, I believe so, because prophecy is going to be fulfilled and a death decree will be given as an ultimatum to those who love the truth.
Revelation 6:11 And white robes were given unto every one of them; and it was said unto them, that they should rest yet for a little season, until their fellowservants also and their brethren, that should be killed as they were, should be fulfilled.
Revelation 13:15 And he had power to give life unto the image of the beast, that the image of the beast should both speak, and cause that as many as would not worship the image of the beast should be killed.
The end time began at the end of Jesus' ministry. Now is the time of delusion. The delusion is multi-faceted, but is ultimately the love of darkness and sin and the forsaking of the truth, which is the testimony of Jesus and the law of love. Satan's target is God's people, as described below.
Revelation 12:17 And the dragon was wroth with the woman, and went to make war with the remnant of her seed, which keep the commandments of God, and have the testimony of Jesus Christ.
Revelation 14:12 Here is the patience of the saints: here are they that keep the commandments of God, and the faith of Jesus.
As has already been shown in the thread, the Sabbath, the fourth commandment, is just one of the commandments that have been forsaken, but is perhaps the most important of all as men profess Sunday. The delusion is well under way.