I don't know whether I'm Christian or not. If you ask the Pagans, I am. If you ask the Baptists, I'm not.
By the strictest definition-- one who believes all other religions are false-- I am not a Christian.
By a more liberal definition-- one who believes that there is one God and in salvation by grace through faith in Jesus Christ as the only begotten Son of that singular God-- then yes, I can comfortably consider myself a Christian.
I do not attend any church or other religious gathering. Asperger's is a disorder of social communication. Church (coven, circle, grove, synagogue, whatever) is a social gathering under religious auspices. I make them uncomfortable, a fact that is farther compounded by the fact that I am female (Christianity, at least conservative Christianity, places much more rigid expectations on female social behavior, and I interact more like a man).
I can read my Bible, pray to God, and do anything else that I do alone, in my home or under a tree somewhere.
They cannot enjoy their social gathering if I am present.
Ergo, I have forsaken gathering together with other believers.
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"Alas, our dried voices when we whisper together are quiet and meaningless, as wind in dry grass, or rats' feet over broken glass in our dry cellar." --TS Eliot, "The Hollow Men"