So Joseph, why do you believe G-d said it is correct?
If it is in the Torah then I know G-d said it is correct since He wrote the Torah. I might not know why G-d said it is correct, but I know that G-d said it is correct.
And that is good enough to know that it is correct, whether I know why it is correct or whether I don’t know why it is correct.
It is good to know why it is correct. But my knowledge of that (or lack thereof) doesn’t affect its correctness. And I hope to know why it is correct.