We have eyewitness testimony and written documentation to prove Jesus.
Since neither of us can prove our worldview on the beginning of the universe, we must pick a side and die on that hill. The thing is, your worldview won't help you after that. If we truly have a spirit that lives on after death, all the science in this world won't help you then. I can see why it would just be easier to not believe in a soul or spirit, and just live in ignorant bliss of that possibility...