Say you have an ailment, hear about a wonderful medicine, and decide to try it. Then the medicine completely heals you and you are very happy and become a firm believer in it. Jesus is like this medicine. I did not firmly believe in him at the beginning, but I decided that he's worthy to be trusted. As I got to know him better and better, I received so many blessings that it's as if God had started giving me his own testimony. My actual experience finally confirmed for me the truth of Christ beyond the shadow of a doubt.