to rest one's case on faith means to concede that reason is on the side of one's enemies- that one has no rational arguments to offer.
Ayn Rand (1988). “The Ayn Rand Lexicon: Objectivism from A to Z”, p.116, Penguin
to rest one's case on faith means to concede that reason is on the side of one's enemies- that one has no rational arguments to offer.