I voted “I have had a non-sensory exerience (a presence or feeling) that I believe was a supreme being”. Here’s what happened.
In the late 90s, my wife died. At the time, I had been an atheist for many years. A friend of an acquaintance called me out of the blue and invited me to have breakfast with him. This was a guy I didn’t know, had never even heard his name before, but for some reason I agreed to meet him. We met at a local diner, chatted a bit while we waited for our food, and then he asked if I minded if he prayed. I managed to refrain from rolling my eyes and agreed that he could go ahead and pray. I don’t remember what he said, but it was off the cuff and personal and seemed like he was really talking to a being he believed in.
He told me that he had called me because he had heard about my loss and felt led by God to try to comfort me. He then proceeded to tell me a story from his early life that involved a personal crisis and what he believed had been the intervention of God in his life that led him away from a really bad outcome. While he was telling me this story, something happened to me. I didn’t hear a voice, but I felt a conviction that was almost like a voice, a powerful thought that consisted only of “He is telling you the truth.” My attention to what he was saying increased dramatically, and his words had a powerful effect on me. I wanted what he had.
I think of what happened to me that day as a spiritual experience, a direct contact with something outside of me. I later came to believe that this was God. I have since had numerous similar experiences during prayer and meditation. These experiences are the primary “evidence” on which my Christian faith is based.