An Agnostic And Atheistic Trek

Damn it Jim! I’m a doctor, not the pope!

From Why the original "Star Trek" still matters by Andrew O’Hehir:

In the middle of the Cold War, Roddenberry imagined a radical-progressive, Enlightenment-fueled vision of the human future, one in which the conflict between capitalism and communism had been long transcended, along with other earthbound forms of racial, ethnic or religious strife. Strikingly, there is no religious or mystical dimension to the "Star Trek" universe at all, at least until much later in its development. (Roddenberry regarded himself as an "agnostic atheist," and banned any religious references from the show.)