Rabbi Berekhya said in the name of Rabbi Levi: This is analogous to an Israelite and a priest who were afflicted with epilepsy. They were given an expert doctor and he would give instructions to the Israelite and disregard the priest. The priest said to him: ‘Why do you give instructions to the Israelite and disregard me?’ He said to him: ‘This one is an Israelite, and he is accustomed to walk between the graves, but you are a priest and you are accustomed not to walk among the graves.17He is susceptible to an evil spirit that causes epilepsy, while you are not susceptible.
That is why I give instructions to the Israelite and disregard you.’ So too, for the supernal beings, in whom the evil inclination is not found, one statement is sufficient: “The matter is by the decree of the messengers, and the verdict by the statement of the holy ones” (Daniel 4:14). However, the earthly beings, in whom there is an evil inclination, if only they will be able to stand firm after two sayings. That is what is written: “The Lord said to Moses: Speak to the priests, sons of Aaron, [and say to them…]”