I'm quoting Canotila here, but I don't her to feel like I'm singling her out. This is for anyone who has said they have this sort of evidence for God.
No worries, and I'm glad you brought this up. To clarify a bit further, I don't have faith that God exists because of my experiences. I had that before any sort of evidence presented itself to me. I started out with faith, and that faith has grown into a knowledge. But not as a result of what happened. What happened is just confirmation for me, that I can't deny.
What would you say to people who have had major prayers ignored? Who needed a miracle, and who didn't get one? What about the vast majority of dead people who were not revived? What do you say to their families?
God's answer to prayer isn't always yes. It doesn't always come in the time frame we would like it to. Just like parents say no to their children, he says no to us if what we're asking for isn't in our best long term interest. None of us are going to live forever, I'm going to die some day even if it did get delayed.
I've had thousands of prayers where I didn't get the answer I wanted to hear. In the long run, it has worked out for much better for me that I didn't get what I was asking for. Some times it's a matter of knowing what to ask. When someone passes, some times it is better to ask for comfort and peace. While it hurts, the time we spend apart from our loved ones when they pass is literally a blink of an eye compared to the rest of eternity.
For what it's worth, medical intervention had no bearing on me coming back. I was flat lined and efforts to resuscitate abandoned. By all rights I shouldn't be able to put together a coherent sentence, but here I am typing away.
The clincher for me is that when you look at people as a group, there's no evidence that people who pray are more likely to get a medical miracle than anyone else. The doctors sometimes pull it off, but they don't pull it off any more often with religious people than with the rest of us. What you end up with is a small group of people who were extremely lucky and who now believe in God, a larger group of people who then become atheist, and the largest group who rationalizes the lack of miracles as being part of God's plan, or something like that.
That's the thing I was saying earlier though. God won't allow evidence of his existence to build, because it runs contrary to his plan. If everybody knows he exists and we're accountable for our actions because the giant glowing face of God beams down at us from the clouds daily, we're not going to have the chance to experience the same growth as we do on our own.
As far as 'worship' goes, I see it as a purely human failing. The very concept of it is about being so in need of demonstrating being 'above' someone that you require them to prove it to you. A human king or queen can demand such a silly thing, because they have the weaknesses of human fear and selfishness that require others to show obeisance to them. If a god or gods did exist, then there are only two possibilities as far as I see it. One is that the gods are decent and not full of human frailties, in which case they would of course not need any such thing as worship. Or, they could be weak, selfish beings and actually demand worship, in which case there would be no need to worship them, because they would not be worthy of it. In other words, there is never a need to worship any being. Just live life the best you can.
I see my relationship with God as more of a parent/child relationship. The whole point of being born and living a mortal life is to experience good and bad, joy and sadness, and learn how to make decisions without the direct influence of our heavenly parents. I believe that God wants us all to grow to our fullest potential, and come back to live with him when we're done because he loves us and likes having us around. He provides guidelines on how to live the best life you can, for people that want them. To me he is more of a parent/guide/mentor than an overlord. Worshipping him, to me, is more about learning to trust. And for me that has been a rewarding experience.