Bill used many names for God in the big book. I like "the Great Reality deep within." It reminds me that there is only one universal truth. We each have our individual truths -- what is true for us, but our truths are based only on our individual perspectives. What is true for me may not be true for you and visa versa.
It seems to me that the process of growing spiritually is the process of letting go of what I think is true and moving closer to the universal truth that I call God. Standing between me and "the great reality" are illusions: The illusion that money, power and prestige brings me security, peace of mind and happiness, the illusion that the chief aim in life is to get comfortable and keep myself entertained. The illusion that my life will be fine as long as I control it well. The illusion that I am somehow separate from you, that there is "us" and "them." The illusion that if I could just get you to feel good about me, then I could feel good about myself. The illusion that I was put on this earth to achieve something and I'm a failure if I don't. The illusion that because I am an alcoholic I am flawed in some way. As long as I am caught in these illusions, I cannot have a full experience of my Higher Power working in my life.
Getting real to me means that I continuously work on myself, becoming aware of these untruths and seeing how these beliefs and attitudes make my life unmanageable. It doesn't mean that I have to try to be perfect, because that would be a struggle and struggling just causes more suffering. It just means that I make it a priority to begin to notice that each of these illusions is another bar in prison I've trapped myself in.