One of the main uses of dowsing , according to me is that it resolves the issue of compatibility very successfully.
I have used the pendulum to determine the compatibility levels between a person and land, money, relationships, disease, food, fears, faults and everything that surrounds an individual from inconsequent every day use items at home to recurring happenings around.
Gnothi Sauton and Meden Agan
were the 2 inscriptions on the wall of the forecourt of Apollo's temple at delphi.
It was meant to convey that before any one could use the guidiance given by Apollo through his mouthpiece, which was a priestess called Pythia needed to
A) Know The Self ( Gnothi Sauton ) and
B) should do nothing in excess ( Meden Agan )
before they could fit the guidiance in to their solutions.