God is not helping Tim Tebow ... this according to a rep for The Church of Satan.

But there is a devilish twist ... the rep tells us Tim's faith COULD actually play a significant role in his success on the field.

TMZ spoke with Magus Peter H. Gilmore -- a high priest in the Church -- who tells us it doesn't make sense to say God is helping Tim win games ... because that would mean God's actively making other teams lose ... and why would God do that?