faith is an act of the will and the will, not reason, is primary in human existence.
If "faith" has a meaning that is separate from "reason" means that the - A is A - relationship between the meaning of the word faith in contrast to the word reason means that "reason" is primary to faith for either word to have any "objective" meaning. And if they have no "objective" meaning, then they mean nothing.
I still to don't your "if." Faith will mean trust in the agency of somebody else who knows more than yourself. That's reasonable.