Are Macbeth’s paranoia due to his own weakness or a consequence of what he did?

I think Macbeth's paranoia is due to his consequence. Macbeth has alot of guilt due to the fact that hes killed so many people. this leads him to have this paranoia. .we see this when he has his hallucination of banquo. also, all his hallucinations and paranoia started once he began killing. because macbeth has let his consequence get to him he began to slowly lose it.