God's silence is proof enough for me. Although, it's not substantial scientific evidence, it's all I need. I remember about a year ago, after dealing with a year's worth of cognitive dissonance, the thought that I could be losing everyone I love at a moments notice, and the knowledge that I had been lied to so much in my life in regards to the "Truth", I broke down into intense prayer and meditation calling out to Jehovah in my mind....... Silence ........... Repeatedly I prayed to him intensely........ Silence. Finally, I said "F%@K this! F%@K YOU, JEHOVAH. Curse you and die! Right? If you're not going to help me, then f%@king kill me like you said you would in the Bible.".......... Silence.
It was at that moment when I hit rock bottom that I realized I was alone in the universe, that there was no God, at least for me. Once I came to that realization, a deep peace settled in on me like nothing I ever experienced in my life as a JW. It was that moment that helped me come to terms with my own mortality. And it was that moment that helped me come to terms with the eventuality that I'll most likely lose everyone I love in the near future because of my views.
I'm not saying that my views are the correct ones. I'm open to changes of viewpoint and increases in knowledge, even if it leads to the exact polar opposite of what I once believed. That's where I am now with the belief in the existence of God, from one extreme to the other. But that's enough for me.