Existence of God

Being brought up in a Christian household, there was no question whether God exist or not. However, there was a time I did wonder how I can believe in someone I have never seen. I was always taught or told that God exist. It was not until I experienced a situation that I knew there was no way I could have control over. It was one of those "Thank God" moments. When I am having a rough time or even a really a good one, I can feel his presence. It's not just the fact that because I think he exists that he actually exists, but that I can really feel him with me.