One of the pesukim in the list of pesukeh Bitachon is from Bereshit, (chapter 18, pasuk 14). After Sara laughs and, so to say, questions her ability to give birth at such an old age, the line in the Pasuk is,
הֲיִפָּלֵ֥א מֵה׳ דָּבָ֑ר
Hayipaleh M’ Hashem Davar?
Rashi says (from the Targum) that it means Is anything covered from God? Next year at this time, Sara will have a baby.
Rashi says Hayipaleh means three Hebrew words, Muflah, Mufrad and Muchseh, which mean hidden or covered, and nothing is covered from Him; there's nothing that He can't do. So in this context Rashi says the word Yipaleh does not mean wonder, it means covered.
Similarly, in Megilat Rut, there was anonymous man called Ploni Almoni, Mr. Anonymous, Mr. X.
Rashi says Ploni means the same thing as the word Yipaleh, covered. He's an unknown man. His name is covered.
So Nothing is covered from God, God can do anything. The Hizkuni says Is anything covered from God means that God knows that she laughed.
Either way, according to these Rishonim, Nothing is covered from God means nothing is stopping God, or there’s nothing that God doesn't know about. That’s the standard explanation, which we always like to start with.
Other Rishonim explain that it means Pele/ a wonder, like “Mafli Laasot/
God does wonders,” as we say in Asher Yatzar.
But the Brisker Rav has a question: Why is the complaint against Sara Is anything covered (or wondrous) to God? There's a better claim against her- Avraham Avinu was a prophet and he said, “You’re going to have a child.” God said You're going to have a child. So that should be it. Why isn’t that a complaint against her?
The Brisker Rav explains that for sure, Sara, believed she would have a child. The problem was , why was it a wonder, a wow to her? The complaint is that she looked at it as something strange. The complaint is not that she believed it was impossible, but that it was something wondrous to her. Why? This is similar to the famous line of Chanina Ben Dosa, when he told his daughter, “The One that says that oil will light will say that vinegar will light.” The burning of vinegar wasn't a miracle to Rav Chanina Ben Dosa. What's the difference between oil and vinegar? If God says it's going to burn, it will burn. That's why it was able to happen, says Rav Chaim Volozhin. Because it wasn't something extraordinary to Rav Chanina Ben Dosa. His heart did not skip a beat, because, why shouldn't vinegar burn if God wants it to burn?
The complaint against Sara, says the Brisker Rav, was that it should have been simple to her.
What's the difference? Is a young woman giving birth not wondrous? Why is it a bigger wonder for an older woman than a younger woman? That was the complaint on Sara.
It’s a powerful pasuk.
Hayipaleh M’Hashem Davar /Is there anything covered from God, Is there anything that's extraordinary for God? Is there anything outstanding for God?
Rav Chatzkel Levenstein adds a little more, based on the Ramban. The Ramban says that Sara didn't know they were angels. She just thought some simple Arab passerbys were giving her a blessing. So what was wrong with her laughing?
And he says that she should have said,”Amen Ken Yehi Ratzon/Yes, Hashem should do that, because a true believer believes that Hashem can do anything.
Even if a simpleton said it, there should have been nothing in her mind that thought that God can't change anything.
It goes back to this pasuk- just like God was able to create the world from the beginning, there is no reason why He can't change it. Like we say, God recreates creation constantly, so if it’s a new creation every second, what’s to stop God from changing it? And therefore, he says the true believer never despairs. Even if there is sharp sword on his neck, he doesn't despair, he doesn't give up.
He might have to pray harder, but he doesn't give up because he knows that Hashem can do anything, and to God there is no difference. Rav Chatzkel brings a Midrash Raba in Bereshit (48,19), that says it's comparable to a man who brought a broken bracelet to a jeweler to fix, and the person says, “Do you think you can fix this?” To which the Silversmith responds, “To make this bracelet in the beginning, I was able to, and I can't fix it??”
So too, God says, I made you to begin with. You don't think I could make you young again?
And Rav Chatzkel Levenstein says, That's what it means Sadik B’Emunato Yihyeh- to truly live with this level of Emuna, that God can do anything. Only we might not be fit for open miracles- for whatever reason. But in our hearts, we have to believe that although we might not be fit, as far as God's concerned, there is no difference. And therefore, Amen Ken Yaaseh Hashem/Amen God can (and hopefully will) do.
Have a wonderful day.