Scientism is the faith that only what science can measure in a test tube can be real. But this seems to be highly non scientific. For science seeks to know what we do not know; not to limit what can be known.
But how can areas beyond what can be tested by a test tube or by pure reason be known? Thus to answer this question I had to turn to Immediate Non Intuitive Knowledge (of the the Kant-Friesian School of Kelley Ross). That means knowledge that is not dependent on the senses nor on pure reason.
And this makes a lot of sense to me because I am sorry to have to admit it but it makes sense to me because of my own personal experience of faith. So I realize that personal experience is no proof of anything, still I have to explain why I find this school of thought to be so compelling.
And along with this I can also believe that mystics like Rav Avraham Abulafia from the Middle Ages-had true mystic vision. [ Rav Abulafia had a lot of ideas that are in absolute contradiction to what the religious world thinks. And I admit I was totally shocked when I first read his ideas in manuscript form in 1992.[This was after I had undergone difficult traumatic times in my life-so I might have been more receptive to his new approach. You might say I was no longer as sure of my ideas as I hade been before that.]
But then how does one tell who has true vision? For this I think you need the mediaeval formula of Faith with Reason. That is Faith may go beyond Reason but Reason still determines what is reasonable.
So the question is how to strike a true balance between reason and faith. The problem is one without the other leads to lunacy. Thus the Litvak Yeshiva approach based on the Gra I think must be thought of as the true approach.