My reasons are a bit shallow compared to many here. Fundamentally, I have a HARD time believing in things I cannot touch myself so faith is something I struggle with because its contrary to my nature and I tend to gravitate towards secularism and secular outlooks. But here is why:
1. When I pray and ask for something, I tend to just know immediately if its going to happen or not. The feeling is accurate (I kept a log to test it even) even if whatever it is doesn't happen immediately. Sometimes I get a not yet feeling and know that I need to mature in some way before I get it.
2. When I have emotional difficulties I am guided through it. This was even true during times of strong depression (like almost all of 2013 when my wife of fifteen years left me and emotional abuse issues from my childhood surfaced at the same time and my sense of identity almost shattered). The guidance always leaves me better off, more emotionally free, emotionally stronger, more mature, more accepting of the crap life can throw at someone, and generally happier.
2a. When there is an issue that I can't deal with, I tend to be given whatever it is I need. I credit the relationship I am with an amazing woman to that. One day I knew she was coming in two months and I needed to do a few activities to make it happen. I was so depressed I declined and I felt that presence get angry and somehow I did those tasks against my will and those things directly lead to meeting her. Similar things have happened on other occasions, I tend to be damn stubborn and have an amazing ability to be wrapped up on my own stuff.
3. I have had physiological changes when desperately needed. This one is hard to explain. This also happened in 2013 (almost exactly a year ago actually). I used to have a hard time in social situations, to the point where multiple people accused me of having high function aspergers. Given my history and the clinical symptoms, I can understand their PoV. However, 2013 forced me to adapt in ways that I simply wasn't able to, I was under an emotional blanket that I had been in all my life and I could not get out of (I wasn't even aware at the time). And in a very desperate moment, I just pleaded to have it fixed, I didn't know what was wrong, but something was. What I remember next was waking up look at the clock and two hours had passed. Somehow I had fallen asleep like a light switch. I had a terrible headache and it lasted about three days and no pain pills helped. When the headache subsided the world was different. When I would deal with people, not only would I get the info I was used to getting, I was getting more information. Their emotions (which I used to be able to detect by practiced viewing of their body language, which took me years to learn) were hitting me like a truck. I could just tell how they felt, what they were thinking, what they were not saying, what they were trying to hide in many cases, etc. It was like seeing color for the first time. Here was a new font of social information I was not previously aware existed. I prayed and asked "wtf do I do with this, its overwhelming" and I knew I would learn in months what others took a lifetime. For the next two months, I had epiphany upon epiphany and eventually what was consciously controlled all the time (like pretty much anything social) just became natural to me. I could even better sense my own emotions. My feeling about myself went from a vague sense of good and bad to a rainbow of different options. I was more aware of my own and the needs of others. Suddenly I had a ton of friends when I didn't have any (and true friends too, the kind who will fight for you when the chips are down) and they were just attracted to me because my personality shifted.
But if one goes back to the aspergers idea, it may have merit. my skin was no longer hyper sensitive, I no longer felt pain against certain loud frequencies, I don't seem to feel a need for routine anymore, and my thought process become much less linear.
So given this, I know something is there, I attribute it to the Christian God because when I do things in those terms, I get the sense that I am following the right path. All the philosophy, bible, logic, reason, etc in the world would not lead me to this. The only conclusion I can come up with is that either I am insane or there is something beyond my understanding working with me. I did enough testing with journals and stuff to throw out the possibility of insanity (which I honestly considered as a possibility).
Honestly though, I gotta wonder why me. I am not exactly a model of a good behavior and I am a weak person and just about everything tempts me with my newfound problem of "oo shiny" since that headache. I am now very right brained in my behaviors. Its odd.