Congratulations PC! You got it!
The two different Fellowships that are specifically mentioned in the Big Book are:
The Fellowship of Alcoholics Anonymous (see page 94, 154, 162, Big Book)
The Fellowship of the Spirit (see page 164, Big Book)!
Near the beginning of the Big Book, I read about Dr. Silkworth writing much of the Phenomena of Craving for alcohol (Dr.'s Opinion) -- describing one of the factors in alcoholism, that makes it impossible for the alcoholic to resist the next drink. (Also see page 143, in regards to craving liquor.)
In Chapter 2, 3 & 4, and page 60, of How it Works, I learned, that for me, because of the particular type of alcoholic that I had become, human aid could not relieve my alcoholism... even the Fellowship of Alcoholics Anonymous (which is human aid).
The Fellowship of AA, did and does help me to stay sober, and it does provide some of the relief that I need (most of the time).
However, the Fellowship of AA, doesn't provide me with all the relief, that I need all of the time, to stay sober all of the time, and to live happy, joyous and free.
When I was newly sober... sober sucked! That's why I drank! Not only could I not be happy and sober at the same time, being physically sober was miserable (to say the least)!
So, I applied the Program of Alcoholics Anonymous (the 12 Steps) to me and my life... which did provide all the relief that I needed all of the time, to stay sober, and to achieve being able to be happy and sober at the same time.
The longer I stay sober, I've noticed that I may be able to stay away from the Fellowship of AA, for a longer period of time, and still maintain a state of being physically sober... but, if I go for a day or two without the daily Program of Alcoholics Anonymous (the 12 Steps)... I rapidly become restless, irritable, discontented, depressed, feelings of guilt and remorse, and a strong inner feeling of personal inadequacy, combined with a feeling and thinking of "there has got to be more to life and I'm missing out on my share of it... and I want it now!" ... Symptoms that alcohol used to temporarily fix for me.
After I took the 12 Steps, and continued in practicing the 12 Steps, I entered the "Fellowship of the Spirit" and "the Fellowship of the Spirit" began treating my symptoms. Now, if I go a day without the Fellowship of the Spirit, the old symptoms pop up immediately.
My personal experience has taught me, that the Fellowship of the Spirit, for me... is not "just me and God as I understand God." I've tried it that way, and it didn't work for me. That's why just me and God alone, isn't enough. It's impossible for me to practice the 12 Steps alone.
For me, the "Fellowship of the Spirit" is... me, and God, as I understand God, and "others" who are also in the "Fellowship of the Spirit" and still "others" who are not yet in "Fellowship of the Spirit". I need all four of those components for me to stay in the Fellowship of the Spirit. If I remove any one of those components, I'm no longer in "Fellowship of the Spirit."
Below are a few references in the Big Book, that refers to my experience in better words than I can describe it myself:
"Still you may say: â€œBut I will not have the benefit of
contact with you who write this book.â€