A good dowser, they claim, does what a good geologist does. Maybe the witching wand just helps him concentrate. Dowsing may be pure bunk, or it may someday reduce to human understanding. But it reflects a powerful craving to find realities outside our understanding. That's where it's kin to invention.
Pure invention precedes understanding, and it stands apart from deduction or reason.
It's a water witch of the human mind. Invention means finding things without knowing quite how we found them. That surprise is available to us, but it comes from within. Invention finds water in the desert by creating the thing we did not expect to find.