Paracelsus calls it ‘primum ac optimum thesaurum, quem naturae Monarchia in se claudit’ (the first and best treasure which the monarchy of nature hides within itself), in this concurring with the world-wide descriptions of the One as the pearl of great price, the hidden treasure, the ‘treasure hard to attain’
Jung grounds the treasure symbol in Paracelsus’s lumen naturae doctrine, equating it with the pearl of great price and the hidden Self as a universal designation for the supreme psychic content concealed within nature and the inner body.
, The Structure and Dynamics of the Psyche, 1960thesis