Psak and Truth

 Igros Moshe (O.H. 1 Introduction): It is correct and obligatory for the sages of the latter generations to decide halacha - even if they are not qualified according to the standards of the sages of the gemora. Therefore there is definitely a concern that their halachic determinations are not in accord with the view of Heaven. However in truth we are guided by the principle that Torah is not in Heaven. Rather it is determined according to what appears correct to the rabbi after proper study of the issue to clarify the halacha according to the Talmud, and the writings of poskim. He is to use his full abilities to seriously deliberate with fear of Heaven - in order to determine what appears to be the correct halacha. Such a psak is viewed as true and he is obligated to issue his conclusion. This obligation exists even if in fact his ruling is contrary to the halacha in Heaven. His ruling is also considered the “word of the living G‑d as long as he is convinced he is correct and it is internally consistent. He will receive reward for his rulings even if the truth is not in accord with his position.This obligation and receiving of reward exists even if the ruling is not in accord with the truth. This is the nature of all disputes of the rishonim and achronim concerning what is permitted and what if prohibited. As long as a universal ruling has not been determined - each rabbi can make decisions for his followers according to that which he thinks is correct - even though the objective halacha is only in accord with one of them. Both will also receive reward for their rulings. Because of this we find much dispute also in the most severe prohibitions - with variations between places that rule like the Rambam and Beis Yosef and those that rule like Tosfos and the Rema. Both of the opposing views are “the words of the living G‑d even though the actual truth as understood by Heaven is only like one of them.