There may be fairies at the bottom of the garden. There is no evidence for it, but you can't prove that there aren't any, so shouldn't we be agnostic with respect to fairies?
“There's a lot to be said for doing what you're not supposed to do, and the rewards of doing what you're supposed to do are more subtle and take longer to become apparent, which maybe makes it less attractive. But your life is the blueprint you make after the building is built.”