Because the bible tells you so?

[Angrboda]

The stranger you meet knows your friend and gives you directions to his house.  You pull up in front of the house, but it just looks wrong.  You get a bad feeling about this.  Now, how does 'logic' help you determine whether that bad feeling is correct, and this is the wrong house, prior to your going up to the house and knocking on the door?  All you have is a 'feeling' about the rightness or wrongness of the house.  That's the type of feeling I'm talking about.  You go throughout your day making decisions based upon that little voice inside your head.  It's not a literal voice, but a set of feelings which guide your choosing, that tell you that c) is wrong and b) is right.

If I did find myself in a position of feeling alone - no easily discernible logical reason....I'd doubt that it represented truth..as I do when I walk out into my yard on a night with a full moon and, for a moment, really feel that there is something human, but inhuman..in the woods..watching me.  That's precisely when I kick the logic into overdrive (and I know it sounds silly coming from an adult...I can't shake that feeling, that fear, that dread, regardless of what I know to be true, or..rather, untrue about it).  Here again, I have means other than my intuition or a chemical cocktail provided to me by my brain alone....available.

My point was just that emotion plays a role in our determining what's true or not. Even in your negative example, it was a particular feeling which triggered you to kick logic into overdrive. And when it comes to religious matters, the feeling may be the thing in our experience that we predominately have to go on. This is especially true when ritual thoughts and ritual actions play with the soup in our brain (raising your hands overhead, singing, chanting, touching things, all these have subtle but profound effects on that soup), ramping up the pleasurable feelings associated with the religious activity.