from Daas Torah - translation copyrighted
Klausenberger Rebbe (Divrei Yatziv O.C. 113): Concerning the view of Rabbeinu Tam and reality. Our holy faith is that Yiftach in his generation is like Shmuel in his (Rosh HaShanna 25b) and that rule applies to all generations. Look at the Divrei Chai (Y.D. #105) in his discussion of the status of the Ohr HaChaim as well as the Beis Shlomo (O.C. 2:112). See also the language of one of the great contemporary gedolim in the Letters of the Chazon Ish (32), “What difference does it make if the angel Gavriel or Michoel tells me – in fact weren’t all the Rishonim fiery angels?… and it was through the holy spirit which appeared in them that they knew how to decide issues – whether to push aside a gemora and establish the tradition of the Geonim or whether to push aside the tradition of the Geonim because of the decision of the gemora… We relate to the Gra in the line of Moshe Rabbeinu, Ezra, Rabbinu Hakadosh, Rav Ashi, the Gra…” Consequently it is known that all poskim whose words are accepted which were given to Moshe on Sinai as the Talmud. Therefore if someone, Gd forbid, should express himself against one of the poskim it is that he is criticizing a Tanna or denying the Torah of Moshe – Gd forbid! This is the root of heresy. Just as we saw the Karaites who believed only in the Written Torah so there are heretic that believe in the Talmud but Gd forbid – not in the poskim. But we view a continuous line from Ravina and Rav Ashi to the Chasam Sofer and the Divrei Chaim and other major poskim. One who is dismissive of a posek is included in what was written by the Divrei Chaim (2:33). Therefore when the poskim themselves disagree – we with dim eyes and for whom bribery and lust blind the eyes even of the wise – we simply can not see the underlying reality of the debate that enables us to decide the issue ourselves. For example, we can not decide on elementary kashrus issues such as “tato gavar” based on the scientific understanding of chemists… even though we can attempt to analyse their holy words from sources in the gemora. At best one who has great ability is able with his greatness in Torah to bring proofs from our Sages and to ascertain what the majority of poskim rule in this particular halacha. Look at the Divrei Chaim (Y.D. 2:45) where he is very upset about the disrespect against the prince of Torah – Rashi. He says, “Even though his words are occasionally difficult for us to understand with our dense brains, nevertheless that which is distant from you is that way only because of our limited intellect. But the main point is, Who in our generation would we say are able to make halachic decisions against the great Rishonim such as these. We have only the ability to accept their words with love and to follow after the majority view – as was done by the Shulchan Aruch itself. Therefore we can not deviate from the rulings of the Shulchan Aruch just because we have some question since we are well aware of of how lowly we are in recent generations..” And since the words of the Rabbeinu Tam and the Geonim are the words of the Living Gd – they are able to disagree with each other regarding the appearance of which stars defines the beginning of night and what is the definition of night. Therefore if someone in our day comes says that one of the poskim erred in the definition of night – he is considered a heretic who has attacked the holiness of the poskim who have said otherwise. We are allowed, however, to say that the customs of which places follows which posekim. For example Shabbos (130a) states that in the place of R’ Eliezer they would cut wood to make charcoal.. However, Gd forbid to say that the custom in one place was different in this place from the other poskim because the reality that we see with our bleary eyes is different i.e., that the poskim erred in understanding the underlying facts. That is because obviously the Beis Yosef, the Pri Chodesh… saw the reality of the stars in Yerushalyim, Tzfas, and Tevirya and they ruled what they ruled…