Many people try to keep science and religion separate. Even believers will compartmentalise their religious beliefs separately from their scientific knowledge. In fact, some theologians see attempts to justify religious beliefs with scientific evidence as a slippery slope. Father George Coyne, for example, warned that scientific knowledge is relative. Conclusions alter as more evidence produces better knowledge of reality. Therefore a theology which justifies itself in scientific terms lays itself open to being proven wrong (see “Scientism” in the eyes of the beholder). Specifically this warning has been made when religious leaders have tried to justify their beliefs using “big bang” cosmology (see Bad science, bad theology).
Mind you – religious apologists who get started on this slippery slope have a solution. Just ignore, or deny, new scientific knowledge. Victor Stenger describes an example of this in his contribution, Godless Cosmology, to the new book 50 Voices of Disbelief: Why We Are Atheists.
He refers to the claim made by some apologists like Dinesh D’Souza and William Lane Craig that “big bang” cosmology shows that the universe, including space and time, started as a singularity. That this must have had an external cause – and you can guess what (or who) they claim for the cause.