The figurehead or the climax of whatever is coming – a movement like scientific humanism, or an individual – is after the working of Satan with all power. That does not mean he has all power, only God has all power.
What are these signs and miracles? Well, I do not know but I can only offer you some guesses just to give an idea of what might be. The kind of sign that will be heralded – worked by scientific humanism and supremely its figurehead, the man of sin – may be the alleged discovery of say a homosexual gene, which will be paraded and heralded and apparently proved. And the unbeliever will grasp at it – there you are, biblical morality has been wrong all along. We have found (they cannot find it at the moment), we found the homosexual gene. The believer will instinctively say, no you have not. He will be supremely cynical because he believes the book of God, the word of God.
Perhaps they will claim to excavate something from the earth which completely disproves the historical integrity of the Bible, utterly convincing to the unbeliever. The believer believes the book of God. ‘No, says the atheist, there is an explanation for this; this religion is completely phoney.’ That is the idea that he will produce his signs, whatever they are. Signs and lying wonders. They are lying wonders, because they are wonders used to deny God and assert a lie.