Many people have disputed my analysis in the previous post where I assert that trust is the key underlying factor for many frum people's belief in the truth of frumkeit. Here's another way of making my point:
Consider two scenarios: First one, you go over to a frum woman and tell her that her son, who she has raised all her life, is not her son. How would she react? "You're crazy! Of course he's my son."
"Well," you reply, "what about if all the roshei yeshiva and gedolim came over to you and told you that he wasn't your son. Would that change your mind at all?"
"Of course not!" she'd laugh. "I know my son is my son, and no one can change my mind about that!"
Now consider the second scenario:
Go over to a frum person and tell them that frumkeit is not true. The reaction? "You're nuts! Of course it's true!"
Now follow up with the same remark: "Well, what about if all the roshei yeshiva and gedolim came over to you and told you that it's not. That actually they don't believe in it themselves. Would that change your mind?"
The parent doesn't doubt what they know about their child, because it's solidly based on their own firm belief, and no one else's uncertainty about that idea has any bearing on that conviction.
Does anyone honestly think that a frum person would remain convinced of their belief if faced with the same challenge?
My point here is not to say that frumkeit is true or false, but rather to point out that most people's belief in its truth is based more on a trust of others than a solid recognition of its own inherent trueness.