Then there will be two men in the field; one will be taken and one will be left. Two women will be grinding at the mill; one will be taken and one will be left. “Therefore be on the alert, for you do not know which day your Lord is coming. But be sure of this, that if the head of the house had known at what time of the night the thief was coming, he would have been on the alert and would not have allowed his house to be broken into. For this reason you also must be ready; for the Son of Man is coming at an hour when you do not think He will. Matthew 24:40-44 NASB
Holy Spirit is preparing His people, warning all of creation, a warning to be ready for the Lord’s return but also as a message of encouragement. …… that even though the world is plunging headlong into depravity, we can trust God. We are not to lose heart; don’t lose faith. The Lord will come like a thief, when the world least expects Him…. We have been strengthened, told, taught and warned by God that mankind will not know the hour of His return….
Revelation 16:13-15 NASB And I saw coming out of the mouth of the dragon and out of the mouth of the beast and out of the mouth of the false prophet, three unclean spirits like frogs; for they are spirits of demons, performing signs, which go out to the kings of the whole world, to gather them together for the war of the great day of God, the Almighty. (“Behold, I am coming like a thief. Blessed is the one who stays awake and keeps his clothes, so that he will not walk about naked and men will not see his shame.
1 Thessalonians 5:2-6 NASB For you yourselves know full well that the day of the Lord will come just like a thief in the night. While they are saying, “Peace and safety!” then destruction will come upon them suddenly like labor pains upon a woman with child, and they will not escape. But you, brethren, are not in darkness, that the day would overtake you like a thief; for you are all sons of light and sons of day. We are not of night nor of darkness; so then let us not sleep as others do, but let us be alert and sober.
2 Peter 3:10-15 NASB But the day of the Lord will come like a thief, in which the heavens will pass away with a roar and the elements will be destroyed with intense heat, and the earth and its works will be burned up. Since all these things are to be destroyed in this way, what sort of people ought you to be in holy conduct and godliness, looking for and hastening the coming of the day of God, because of which the heavens will be destroyed by burning, and the elements will melt with intense heat! But according to His promise we are looking for new heavens and a new earth, in which righteousness dwells. Therefore, beloved, since you look for these things, be diligent to be found by Him in peace, spotless and blameless, and regard the patience of our Lord as salvation.
We are to heed every word God tells us -- and when He makes the same statement (the day of the Lord will come like a thief) throughout His living Bible, we must take notice.