Odd you should say that.
I am muslim is because I was born one
The only reason I am Muslim is because I choose to be one.
If you read through these threads, especialy the ones that are written by our Aethiest members, You will see there are very many logical reasons to believe Allah(swt) does not exist.
In the face of all of this logic there must be some reason why those of who do believe, believe so strongly. What things have we seen, heard or done that cause us to have such strong beliefs?
For myself it is a simple answer. I am convinced that the Qur'an is true and verifiable. My reasons for believing that would be an entire thread at least. So, without going into detail and to keep this thread on topic, I will just leave it at I know the Qur'an is true.
Now, that I know the Qur'an is true, why would I believe Islam is the only valid way to serve Allah(swt)? It seems there should be many ways to serve Him(swt) What logic is there to have us pigeon holed into one belief system?
That actually makes since, as with one system, it is a means that we can learn methods to support each other. We can see conrete evidence of when we wander off the path. It gives us a guide that allows us to give each other direction.
If I were to choose to travel from Austin, Texas to Poughkeepsie, New York. I believe I should use a map that directs me in that direction. I could use other maps but, I don't think my very good intentioned friends, who have a map of South Africa will be of much help to direct me to Poughkeepsie.
Since I know Jannah does exist and I know it is where I want to be. It only makes good sense to seek directions from People that have the road map. I have found that road map in Islam.
Since you were born Muslim, you did not have to conduct a life long search to find the direction, it was always in front of you. I spent many years wandering, it took removal of many doubts for me to accept Islam. But, it came to be, simply because 65 years of all other thoughts finaly lead me to the single conclusion that Islam is true.