Before Christ’s coming there will be certain signs

2 ^1-4 Now we do implore you, by the very certainty of Christ’s coming and of our meeting him together, to keep your heads and not be thrown off balance by any prediction or message or letter purporting to come from us, and saying that the day of Christ is almost here. Don’t let anyone deceive you by any means whatsoever. That day will not come before there arises a definite rejection of God and the appearance of the lawless man. He is the product of all that leads to death, and he sets himself up in opposition to every religion. He himself takes his seat in the temple of God, to show that he really claims to be God.