Therefore, stay awake, for you do not know on what day your Lord is coming. But know this, that if the master of the house had known in what part of the night the thief was coming, he would have stayed awake and would not have let his house be broken into. Therefore you also must be ready, for the Son of Man is coming at an hour you do not expect. (Matthew 24:42-44 ESV)
Even if we dwell in Christ and he dwells in us, the great secret of the time of his return will be a surprise. Our preparation is not an anxious effort to guess the day and time, but to “be awake,” which his Apostles say is to be living every moment as children of light, disciples of Jesus,
But you are not in darkness, brothers, for that day to surprise you like a thief. For you are all children of light, children of the day. We are not of the night or of the darkness. (1 Thessalonians 5:4-5 ESV
Those who live as disciples are out of the dark, no matter how obscure some of God’s mysteries remain to us. And for disciples, the surprise of Christ’s return is a pleasant one (and that’s an understatement),
And there will be signs in sun and moon and stars, and on the earth distress of nations in perplexity because of the roaring of the sea and the waves, people fainting with fear and with foreboding of what is coming on the world. For the powers of the heavens will be shaken. And then they will see the Son of Man coming in a cloud with power and great glory. Now when these things begin to take place, straighten up and raise your heads, because your redemption is drawing near. (Luke 21:25-28 ESV)
When the secret is uncovered, those bowed down by affliction in a fallen world will stand tall and look with joy upon what is causing Christ’s enemies to faint with fear.
So it is that the Lord teaches us to pray for the coming of the kingdom, and John was blessed with the final words of our Bible, a prayer longing for Christ Jesus’ return and for those who belong to him to do no more than abide in the light of unmerited, undeserved favor by which we are his brothers and sisters,
He who testifies to these things says, “Surely I am coming soon.” Amen. Come, Lord Jesus! The grace of the Lord Jesus be with all. Amen. (Revelation 22:20-21 ESV)