Sure, but it does help...
I've got some friends who tell me that they want God to come down and move in a such a mighty way that there is no way not to believe - or at least to quench any of their own doubts about His existence. These are the types who ride the fence, simultaneously hoping God will move mightily and also hoping He won't, so that their lives will not be altered in any way. So, when I read the the Gospel in the Office today, my first thought following Jesus' words were, "Yeah, I know that type..."