If you are skimming the PDF for the first time, look for these three core concepts:
Gardiner’s thesis is radical. He argues that the Grail was never a physical object. Instead, it was a universal symbol for a hidden science—the understanding of the (the serpent energy at the base of the spine).
Forget the evil snake in the garden. Gardiner traces the serpent symbol back to ancient Sumeria and Egypt (the Uraeus). He argues that the serpent represents DNA, healing, and the life force itself. The "Grail" was the vessel that contained this serpent energy.