If you believed Moses, you would believe me, for he wrote about me.
In context
44How can you believe, when you accept glory from one another and do not seek the glory that comes from the only God? 45Do not imagine that I will be your accuser before the Father. Your accuser is Moses — the very one you have set your hope on. 46If you believed Moses, you would believe me, for he wrote about me. 47But if you do not believe what he wrote, how will you believe what I say?”
