But Christianity’s most offensive tenet by far has nothing to do with the virgin birth or the resurrection of the dead, but the first half of John 3:16: For God so loved the world. There will never be proof of that, though some see it in trees.
How can we know this God exists? We cannot. Only that sometimes, some days, some of us sense an absence, which feels very much like presence. It stings the eyes, we blink, and see lights and heroes all around us.