Roboramma - The only thing I have to go on is my experiences, some of which are similar to RandFan's, some of which are not. I know what the fruits of my actions have been and so I can only suggest that those might be possibilities for others who are going through something similar. RandFan and I have both explained our experiences, etc. and there are similarities and differences. Explaining how I know it is true is as difficult as explaining what salt tastes like to someone who's never tasted it. I think God set it up this way so that each of us are personally responsible for our own relationship with Him rather than lazily depending upon someone else's "proof" - though many fall into that pattern anyway. I do know that God exists and that Jesus Christ is His perfect Son who walked the earth 2000 years ago, that Joseph Smith was a true (imperfect, just like Moses, etc.) prophet of God, and that the Book of Mormon is the word of God. For each one of these specific statements, I have had specific spiritual confirmations. It was a warm, peaceful feeling combined with pure knowledge being poured into me - sorry, that sounds corny, but it's the best way I can figure out to put it into English. It was something outside of myself coming into myself.
RandFan - I do have a curiosity question for you. Specifically which parts of Mormon doctrine and commandments are you breaking now, if any? Don't worry, I'm not going to use anything you say against you in any way, I just want to understand more about your experience and this question might help me understand. Of course, you don't have to answer it if you don't want to.