The Greek word used by Paul for Christ’s Second Coming is parousia. It means “appearance” or “presence” - the presence of a king. It was used for the coming of an emperor to a city, when everybody, including the leading citizens, would go out of the city to greet him.
Paul uses another word in connection with it, namely epiphaneia, which means “brightness,” in other words, a parousia with shining glory. And all the citizens of the New Jerusalem will go out to meet Him in the clouds, and “thus we shall always be with the Lord” (1 Thessalonians 4:17).
When Paul spoke of the Parousia of the Lord, he contrasted it with the Parousia of Satan. (2 Thessalonians 2:9). Satan will be manifested through false signs and wonders in a display of devilish power. But, we read that the bright shining Parousia of Christ will totally destroy this satanic Parousia or manifestation (2 Thessalonians 2:8).
The devil is the enemy in Scripture. He thinks that the world is his oyster. He is “the god of this world” (2 Corinthians 4:4), “the prince of the power of the air, the spirit who now works in the sons of disobedience” (Ephesians 2:2). By nature, we are all children of the rebellion. Satan takes people captive to do his will (2 Timothy 2:26).
The people of the nations have suffered so much under oppressors who have exploited them, crushed them, slaughtered them, and starved them, but behind it all is the working of Satan. He is the arch terrorist and murderer. Without that monster, that dragon of all evil, the world would be relieved indeed.