The prophet Amos warns the Jewish people, "Behold, days are coming, says the Lord, and I will send a famine in the land, not a hunger for bread nor a thirst for water, but to hear the word of God... and they will run about to seek the word of the Lord and shall not find it" (Amos, 8:11,12). Rav Shimon Bar Yohai commented: "Heaven forbid that Torah will ever be forgotten from Israel." If so, then what is the meaning of the above verse? It means that a time will come when Halakha will not be monolithic. There will be no definitive Halakha. There will be diversity (Shabbat 38b-39a).