I feel obliged to warn every Jew about the teachings of Rabbi Moshe ben Nachman (Nachmanides, the RaMba"N, not to be confused with the RaMba"M.).
Go to thumbnail #45, which is page 47 of the text "Anti-Maimonidean Demons":
I have checked the references concerning the Introduction to the Ramban's biblical commentary and his biblical commenary concerning Na'amah.
I have, sadly found what Rabbi Faur says to be accurate.
The RaMba"N clearly injected pseudo-Kabbalah, the worst of it, into Judaism, into the very heart and Soul of Judaism - החומש.
I was shocked and hurt to read this.