I don't think it is possible to destroy the Intellect. I do agree with you though that they sure try! But I think as long as a person is alive there is hope his/her Intellect will awaken. (We are made in God's image after all, despite all our failings and imperfections.) For some it takes a personal tragedy or serious trauma for it to awaken. Others seek to awaken it on purpose.
"There is only One Light, and "you" and "me" are holes in the lamp shade."
"About the properties of Imaginatio, do you know about the distinction made by the famous alchemist Paracelsus between "imaginatio phantastica" and "imaginatio vera"?"
No. I'm all ears. I mean eyes. ;-)