[ArraryTauTDew]

Would it be fair to say, 'even if there are, so what? - If I can't quantify it, I'd rather forget it'.

Yes, I think it is fair... for some people it is. And that is ok.

Of course, there are also those who claim that belief is the essential ingredient, missing in the purely rational mind. Any milage in this argument I wonder?

I do not use "believe" because is can be taken as a blind way of believeing. I like to use "confidence" indicating the difference that it is developed thorugh your own experience.

In Soto Zen tradition we talk a lot about Kung Fu, as a way to develop Inner faith about the path. I feel this is not superstition but a true development that is beyond intelctuality and rationality.