An atheist is one who proscribes to no religion. There is no doctrine, clergy, ritual, talk of end days, no market for indulgences, no original sin, no automatic hierarchy and no absurdities to believe. Subservience is still voluntary.
An atheist subscribes to no religion. To "proscribe" is to forbid. But, yes, this is important to bear in mind, not so much for us, but for those who will insist that atheism is its own belief system with its own dogma and "priests" and cohesive world view.
Thanks Don :)