I do not think that Fr. SR is advocating “blind faith.” I feel that label is often used as a pejorative for “faith” in any meaningful sense of the world. Instead, I interpret SR to be referring to the “presuppositionalism” that we have touched on previously.
I don’t think “blind faith” is what he would call it, or what we should call it. It is more like a “seeing faith” (or a claim to such an epistemological reality). As King David says, “In your light, we see light.” (Psalm 36:9). Or as CS Lewis once wrote, “I believe in the sun, not so much because I see it, but because by its light I see everything else.” Faith in God functions in the same way. The Philosopher Alvin Plantinga has spoken of this in his defense of “basic beliefs,” and has earned the respect of his secular colleagues.
I disagree that the truth can be found “within.” We can certainly perceive the truth within, as we are knowing subjects; but for truth to be Truth, it must be objective. You are a Jesus freak, I’m a Bible freak, maybe we can find some common ground eventually. But I believe the Book when it says that this whole mess began when we sought the truth “within.” “Ye Shall be as gods, knowing good and evil…” (Gen. 3:5)
I reject monism for Trinitarianism, though if I had to choose between monism and pluralism, I would go for monism. The Trinity informs me that the One and the Many are equally ultimate, however this is grounded not in a created one-and-many; but in the eternal one-and-many. Relationships - or a turning to the other as an actual other, and finding union/communion in the other - are a fundamental aspect of reality. Therefore, a self-dependant “turning within” is a turning from reality.
Epistemology is rooted in ontology. The Trinity is an "other" related ontological absolute.
“Each Person of the one God, having His being in the Others, is therefore wholly selfless, possessing the quality of spontaneity, self-emptying or self-forgetting (“nothingness”) that Lao Tzu intuited in the Tao. Each Person (Each “I”) forgets Himself before the Others, emptying Himself in perfect love, and in this ineffable love lies the secret of God’s oneness.” - Heiromonk Damascene, “Christ the Eternal Tao,” pg. 251-52
“No sooner do I conceive of the One that I am illumined by the splendor of the Three; no sooner do I distinguish Them that I am carried back to the One. When I think of any One of the Three, I think of Him as the whole, and my eyes are filled, and the greater part of what I am thinking escapes me [...] When I contemplate the Three together, I see but one torch, and cannot divide of measure out the undivided light.” - St. Gregory of Nanzianzen