Noun
the gears by which the motion of a machine can be reversed
Source: WordNetI can only go one way. I've not got a reverse gear. Tony Blair
Absolute atheism starts in an act of faith in reverse gear and is a full-blown religious commitment. Here we have the first internal inconsistency of contemporary atheism: it proclaims that all religion must necessarily vanish away, and it is itself a religious phenomenon. Jacques Maritain