Human spirit is the ability to face the uncertainty of the future with curiosity and optimism. It is the belief that problems can be solved, differences resolved. It is a type of confidence. And it is fragile. It can be blackened by fear and superstition.
Science is a little bit more than a wonderful way of modelling and predicting; it's a wonderful technical abstraction. I think science is a really wonderful technical abstraction.
The Idea enters the brain from the outside. It rearranges the furniture to make it more to its liking. It finds other Ideas already in residence, and picks fights or forms alliances. The alliances build new structures, to defend themselves against intruders.
Thought, like any parasite, cannot exist without a compliant host.