Through out the Bible, story after story you see so many doubting that God could do what he could do. Although Jesus proved time after time what he could do he was still doubted by so many including his disciples. Why was that? Why is that? I mean miracles were proven before many a witness. Demons recognized his (Jesus') power. But man still doubted. My conclusion is this, no matter how much you show someone something, unless they accept it in their mind, body and soul, doubt just keeps on keeping on. Faith is but the size of a mustard seed. You have to have faith that no matter what, God has you. No matter what you go through there is something that you should take away from that experience to build on.
John 3:16 For God so loved the world that he gave his one and only Son, that
whoever believes in him shall not perish but have eternal life.