It states (Tehillim 118:23) היא זאת היתה 'ה מאת בעינינו נפלאת, "This was from Hashem; it is wondrous in our eyes." The Beis Aharon (rosh chodesh Nisan) explains that whatever happens to a person, he should say (or at least think) מאת 'ה, "It was bashert. It is from Hashem." He shouldn't attribute anything to chance. He should repeatedly say, "It was from Hashem." And when one does so, בעינינו נפלאת היא, he will merit to see wonders with his eyes.
But many people are blind and don't recognize Hashem's wonders. It states (19:14) המקום מן צאו קומו ויאמר בנתיו לקחי חתניו אל וידבר לוט ויצא חתניו בעיני כמצחק ויהי העיר את 'ה משחית כי הזה, "And Lot went forth and spoke to his sons-in-law, the suitors of his daughters, and said, 'Arise, go forth from this place, for Hashem is destroying the city,' but he seemed like a jester in the eyes of his sons-in-law." They didn't take the warning seriously. They thought it was all just a joke.
Just moments before, a great wonder and miracle occurred in Sedom, which everyone knew about, but apparently, people remained blind and didn't recognize the miracle. It states (19:4) ועד מנער הבית על נסבו סדם אנשי העיר ואנשי בסנורים הכו הבית פתח אשר האנשים ואת ...מקצה העם כל זקן הפתח למצא וילאו גדול ועד מקטן, "And the people of the city, the people of Sodom, surrounded the house, both young and old, the entire populace from every end of the city... And the men at the house's entrance were struck with blindness, both small and great, and they toiled in vain to find the entrance."
Lot's sons-in-law should have recognized this miracle and understood something unusual was happening. But apparently, they were smitten with spiritual blindness. They saw, and they thought it was natural. They didn't recognize Hashem's hand.
The Shem MiShmuel (5680) writes, "We can learn a lesson from this: There are times, and there are factors, that if a person thought about them, he would recognize Hashem's wonders, hashgachah pratis, and reward and punishment. But when a person chooses to turn away from thinking about these matters, he is smitten with blindness; he sees but doesn't see."
The Shem MiShmuel concludes, "In our time, everyone can see Hashem's wonders... There is hashgachah pratis in every detail; only a person must be cautious not to be blind."
