Theists, are you immune to being decieved?

[The Reality Salesman01]

Is there a standard within our assumed reality by which we measure fantasy from reality? From what part of behavior is delusion a member? To take an example from Socrates, if I were to ask of you which numbers are odd, you would tell me it is those numbers that cannot be divided into equal parts.

So of what behavior is delusional while other behavior is not?

Or are all assumptions presumed to be equally grounded in reality?