While I'm not a fan of organized religion, I remember reading a rather interesting and well-done medical study that concluded that the human brain is hard-wired to believe in a higher power. I've had a lot of interesting discussions that stem from that. Are humans designed to believe in a god or gods? If so, by whom/what? Have we done this to ourselves with thousands of years of spirituality? Why did we become spiritual creatures in the first place? Was it the hardships and uncertainties of life and if so, are animals also spiritual?

Fascinating topic, I think.