It has been stated elsewhere on here that the laws of the Torah are eternally binding on all Jews (e.g no chametz on Passover, shake the 4 species etc.), is there anywhere that discusses whether other material in the Torah that is more "hashkafah" based (e.g "Ain od Milvado") is also eternally binding to be accepted/believed?
Another example although it's from a Talmudic teaching based on Tehillim, in Chulin 7b it says: "a person does not stub his toe unless it was decreed upon him on high."
This basically falls under the first principle of faith of the Rambam (i.e G-d's hashgacha), such that according to him one that does not believe in it has no share in the world to come.
How is it known that this is still applicable today?