[quote=JKirkLVNV]This is the original quote. “Completely-without-a-doubt” is, by definition, possible only for those who already have died and who “see Him as He is.”
Of course it is a mortal sin, how can any other conclusion be reached. Again, if the doubts are momentary and easily dispelled and corrected by the person having these doubts (and I am talking nano-seconds of doubt, not days or weeks) then possibly it would not be mortal sin. If the doubts are lingering and persistent, how could it be anything other than mortal?
I don’t think that this person is talking about doubt in terms of disbelief, ie., I think he or she means something else. Sometimes when I’m going to Holy Communion, I am almost in an ecstatic state. Other times, I hear a small voice that say, “C’mon, you actually believe that little piece of bread is God HIMSELF?” When that happens, I make an act of faith or adoration (“Glory be to Jesus in the Most Glorious Sacrament of the Altar”). “Doubt” in terms of “final reprobation” would consign one to the darkness, but doubt that pokes at you and you poke back by seeking understanding, making humble submission, making acts of faith, acting IN faith in spite of the doubts, can only be a part of the journey of faith for some people. Blessed Theresa of Calcutta was, reputedly, plagued with doubt for many, many years.
I tend to agree, if the writer would clarify exactly what he meant, again by: EXACT QUOTE “Is it a mortal sin to doubt the existence of God?” Then much could be cleared up.
Otherwise I think the quote is, as they might say Res Ipsa Loquitur. In other words it speaks for itself.