When someone asks “What is this?” you should answer, “For with a mighty hand the Lord brought us out of Egypt, out of the house of bondage.”

Can someone explain to me what is going on here???

Nothing special. The questioner here apparently assumes that two words with a question mark at the end make a question. I explained to him that they do not. Ailon is suggesting making that clear to him in a different way than I did.

It’s almost begging for someone to paste in some vague expression here to satisfy the questioner with an incomprehensible answer:
“Faith is neither intellect nor emotion, but the most fundamental self-revelation of the essence of the soul, which ought to guide it according to its nature. And when its natural path is not corrupted, it needs no other content to support it, for it finds everything within itself. When its light grows weak, then intellect and emotion come to clear the way before it. And even then it must know its own worth: that intellect and emotion, its servants, are not its essence. And when it is established firmly in its strong dwelling place, then intellect and emotion will succeed in clearing the path and in providing the intellectual and moral means that remove the obstacles from its way.” (Rabbi Kook)

To the questioner: you really should explain the question, because there’s no substance to it and it can be taken in any direction we want…

The truth is that you can answer even briefly. The word “emun” in the Hebrew Bible (Tanakh) means, everywhere, standing. Or more precisely, standing firm (“If you do not believe, surely you shall not be established,” “I will fasten him like a peg in a secure place,” and a million other places). And indeed the root a-m-n interchanges in its letters with the root a-m-d (and by the way also with “truth”). So the short answer is that faith is standing firm.

That is, faith in… means standing on / relying on…