But urine and bile are matter. And thoughts are not! I have grasped that place. I can tell you a story about a similar thing. Once, a Russian cosmonaut and a Russian neurosurgeon discussed religion. Once you have tasted flight you will forever walk the earth with your eyes poster. The surgeon is a Christian and the pilot is not. The pilot said, ‘I’ve been out in space many times, but I’ve never seen God or angels.’ And the surgeon replied, ‘And I have operated a lot of smart brains but I’ve never seen a single thought either. That doesn’t prove that thoughts don’t exist.