So I take it you believe the Bible is complete and final (sola scriptura)?
If so, I have 2 questions for you:
1. “Man should not live by bread alone, but by every word that proceeds forth from the mouth of God...” Is this a true scripture?
Yes, I believe that the Bible is complete and final.
That scripture is considered by some to be difficult, but in reality, if you look at it from a literal point of view (the position that should always be taken unless the text itself would imply that it is an allegory), it is not so difficult.
This was Christ’s reply to Satan when Satan tried to get Jesus to turn a rock into bread (remember that Jesus had gone without food for 40 days and His physical body was experiencing hunger). Jesus was simply saying that his true norishment and sustinance was to do the Father’s will.
IN no way does this verse *unless taken completely out of context and stretching it very far can you even remotely suggest that it would imply further revelation of God beyond what is provided in what would become the Bible.