From A Course in Miracles (ACIM) T-2.VI.9:1-14:

“Everyone experiences fear. Yet it would take very little right thinking to realize why fear occurs. Few appreciate the real power of the mind, and no one remains fully aware of it all the time. However, if you hope to spare yourself from fear there are some things you must realize, and realize fully. The mind is very powerful, and never loses its creative force. It never sleeps. Every instant it is creating. It is hard to recognize that thought and belief combine into a power surge that can literally move mountains. It appears at first glance that to believe such power about yourself is arrogant, but that is not the real reason you do not believe it. You prefer to believe that your thoughts cannot exert real influence because you are actually afraid of them. This may allay awareness of the guilt, but at the cost of perceiving the mind as impotent. If you believe that what you think is ineffectual you may cease to be afraid of it, but you are hardly likely to respect it. There are no idle thoughts. All thinking produces form at some level."
(https://acim.org/acim/en/s/67#9 :: T-2.VI.9:1-14)

From Rabbi Yehuda Berg, Daily Kabbalah Tune-Up [10/8/11]:

“If you want to know who you are, observe your thoughts, because it [all] begins there.”

From AA: Big Book, 4th Edition, Chapter 3, p. 35:

“What sort of thinking dominates an alcoholic who repeats time after time the desperate experiment of the first drink?”

As for me personally, I couldn’t imagine [couldn’t think] being without a drink. Therefore, I was never without knowing there was alcohol nearby. Consequently, I always had access to my first drink of the day and so my life never really changed day after day after day – until I hit bottom.

Blessings to all. Don My book, How the Bible Became the Bible is available for sale.