As an Atheist not that that is even a thing, as it is merely the lack of belief in something as opposed to a belief in something. I have found that many people believe that it is impossible to be a spiritual person without a belief in a higher power. In addition to this I found it very hard to find a way of learning about meditation without some of the obvious God/higher power type references which tend to go hand in hand with such practices. In these videos author Sam Harris discusses some of these issues they may be useful to any of you guys in a similar position.