It specifies "sustaining" faith (which may or may not be religious, as someone said). I assume that this means that when you lose it, you are no longer feeling sustained, fulfilled, whatever. That could easily be related to depression or other mental disorders, surely. If you lose faith but come to a point where you are still sustained and contented, I wouldn't think there's any issue and I wouldn't think it'd apply.
Ponders too much; thinks too little.


