Studying or listening to ACIM

I hope y’all will take this in the Spirit (!) it’s intended. As a review of material as weighty as A COURSE in Miracles … I studied it thoroughly for 5 years, spending 1-4 days on each of the 365 lessons. I marked up my book each time I read it with a different color and wrote copious notes in margins, etc. I prayed and meditated over each and every lesson until it became a part of me. I spent many many hours every single day with the text part of the COURSE. I was thrilled that I could understand it as much as I did and I attribute that to having studied Joel Goldsmith’s teaching ever since I was first able to read. So for me, listening to Joel and Herb is a kind of reinforcement, as ACIM would be. I used to listen to ACIM on cassette tapes and then MDs… But my point in this diatribe is that since it’s a Course, I don’t know if just listening will serve you well enough.