One impression that emerges from reading the Lubavitcher Rebbe’s letters on matters of faith is that deep skepticism and profound belief are not opposites, but rather belong together in a healthy soul. You can see this in the way the Rebbe describes the historical giving of the Torah at Mount Sinai, taking a Kuzari-like tack of questioning which other historical events we ought to believe in if not the giving of the Torah. You can see it in his revealing response about fossils. And so, too, in one of his famous lessons “proving” the existence of G-d, when the Rebbe calls for consistency in our skepticism — if you don’t believe in G-d, you must, to be consistent, also deny many things you do believe.
Since skepticism is both useful and in consonance with his deep belief in the Torah, the nature of the Rebbe’s proofs and demonstrations is not really to move the recipient of the letter from skepticism to belief. Rather, the Rebbe moves us from doubt to certainty, to a point where we are still skeptical but it doesn’t matter. In fact, the Rebbe reveals our skepticism to be merely the other half of our soul’s desire to know the truth, no less a tool for finding G-d than our capacity to commit and believe.
It is a transformative and uplifting view of skepticism, which finds the light in the darkness, allowing the darkness to remain in its place and yet somehow shine. This is one sense in which the Rebbe’s skepticism has a quality of the messianic age when flesh shall behold G-d.
In truth, the connection runs even deeper, for it is not just faith in general, but faith in Moshiach itself, that inspires this holy skepticism. All who are not yet skeptics have not yet fully considered what Moshiach means.
After all, even the Tzaddikim, the perfectly righteous, shall repent when Moshiach comes. Those familiar with the inner Torah recognize that the Tzaddik is the very embodiment of perfection, eternity, and consistency. If there is one thing in this entire world on which, from a G-dly perspective, we can rely, it is the Tzaddik. Yet, in the coming age, even the Tzaddikim will change and become something unimaginably greater than what they are now. What applies to the Tzaddik applies infinitely more to anything that now conceals even an iota of G-d’s light, from a Beinoni down to frogs and rocks and mollusks. So: Everything will change when Moshiach comes.
But because the change is a change of repentance, of Teshuva, and the highest form of repentance at that, it is not a change that will occur only from the Moshiach’s arrival and onward. On the contrary, like all such Teshuva, it will be a change that propagates backward in time as well. Or, to put it more simply, when Moshiach comes we will see how the way everything existed before Moshiach was a totally necessary part of bringing about its existence under Moshiach. Sins will be seen as the road to a deeper relationship with G-d. Skepticism will be seen as the road to deep faith. Pre-Messianic rocks will be seen as a preface to Infinite Revelation. In other words: Not only do we not know, now, what a rock will be when Moshiach comes, we also, because we believe in Moshiach, don’t know what the rock is at this moment. Moshiach will recontextualize each and every being in our current reality into its own story; everything will one day be about Moshiach.
Therefore, if, today, we don’t see how each thing is about Moshiach, how a frog or a sarcastic remark is about (in the deepest sense of the word) the perfect and infinite revelation of G-d within the world, we have never met these things; we know only the most superficial aspects of their being.
On the contrary, a simple curiosity to know things as they are right now, to explore the world around us in light of the knowledge that some moment soon everything will be deeply retroactively transformed, would express as an obsession with the Messianic age. If we were fully cognizant of the imminent permanent transformation of reality, our curiosity about things would mainly concern the spark of Moshiach we could find within them.
In this sense is the Rebbe the ultimate skeptical scientist.