And as in the days of Noe, so shall also the coming of the Son of man be. For as in the days before the flood, they were eating and drinking, marrying and giving in marriage, even till that day in which Noe entered into the ark, And they knew not till the flood came, and took them all away; so also shall the coming of the Son of man be. Then two shall be in the field: one shall be taken, and one shall be left.
Two women shall be grinding at the mill: one shall be taken, and one shall be left. Watch ye therefore, because ye know not what hour your Lord will come. But know this ye, that if the goodman of the house knew at what hour the thief would come, he would certainly watch, and would not suffer his house to be broken open. Wherefore be you also ready, because at what hour you know not the Son of man will come.
From The Gospel as Revealed to Me by Maria Valtorta (Chapter 596.48):
[…] As it was in the, days of Noah, so it will be when the Son of man comes. In the days before the Flood, men were eating, drinking, taking wives, taking husbands, without worrying about the sign, right up to the day Noah went into the ark and the cataracts of heaven were opened and the Flood swept all living beings and things away. It will be like this also for the coming of the Son of man. Then two men will be close to each other in the field, and one will be taken and the other will be left, and two women will be at the millstone grinding, and one will be taken and one left by the enemies in the Fatherland, and even more by the angels who will be separating the good seed from the darnel, and they will have no time to prepare for the judgement of the Christ.
So be awake because you do not know at what time your Lord will come. Consider this: if the head of a family knew at what time a burglar would come, he would stay awake and would not let his house be robbed. So be vigilant and pray, being always prepared for the coming, without letting your hearts become sluggish through all kinds of abuse and intemperance, and your spirits be dull and distracted from the things of Heaven by excessive care for the things of the Earth, so that death may not take you all of a sudden, when you are not prepared. Because, bear this in mind, each one of you must die. All men, once they are born, must die, and this death and subsequent judgement is a particular coming of the Christ and its universal repetition will take place at the solemn coming of the Son of man. […]
[From The Notebooks. 1943, 9 december]
[…] “I think I have repeated a number of times that one either believes or does not believe , that my time is not measured by your measure, that those who believe without demanding proofs will be blessed.
“I now add that prophecy may go through periods of repetition or apparent negation which later turn out, instead, to be only a trial sent by God for men’s faith.
“All ancient and modern prophecies (I call those from Adam until my coming ‘ancient’ and those from my coming until the present moment ‘modern,’ for your twenty centuries are a fraction of an hour compared to my Eternity) present points in which they appear to be mistaken, for, in your view, they should have taken place in a given period and did not. But the eye of my servant sees with my Eye. You, on the other hand, see with yours. So that my servant speaks or repeats in my Name, and what you believe has already occurred may be an event still to take place in the future. This holds for all prophecies, including those of the greatest spirits.
“Even the perfect Prophecy—mine—may seem to be mistaken and contradicted by the facts to those looking with their human eyes. From the reading of the Gospels, wouldn’t it seem that the end of the world follows shortly after the destruction of Jerusalem? But how many centuries have elapsed since then? And yet the end of the world will be preceded by the signs I speak of, which have already seemed to be close, on so many occasions, to your ignorance and fear. I alone know the moment they will begin, and I do not deem it necessary to say when. Out of goodness, too, towards those living at that time.
“Now then, I say the same words to you as my saints said: ‘Before the Lord one day is like a thousand years, and a thousand years, one day. It is not that the Lord is delaying, but He uses patience.... There are things difficult to understand which the ignorant and unstable distort for their perdition.’
“Oh, blessed are the believers and those content with no need for excessive proofs; blessed are those who rest on the word of the Lord, even if it seems obscure to them, and do not procure for themselves the torments of Thomas, who suffered for more days than the others because he did not believe in my Resurrection, and for additional days, later, through repenting of not having believed except after having observed! […]