I warn you, whoever you are, oh! You who want to probe the secrets of Nature, that if you do not find within what you are looking for, neither will you find it outside. If you ignore the excellences of your own house, how do you pretend to find other excellences? Within you is hidden the treasure of treasures. Oh! Man know thyself and you will know the Universe and the Gods.
~Phrase inscribed in the ancient Temple of Delphi~