Most are familiar with or have heard of the Vedic Chakra system.
The Celtic Irish also recorded a system that some feel service the same purpose of human development.
Let us perhaps take a closer view of "The Celtic Irish Chakra System"
As told in the wonder find most often called " The Cauldron of Poesy"
A most worthy study foe any on their Druid path.
>> During the 7th century CE, an Irish fili or sacred poet composed a poem on one of the mysteries of the Irish wisdom tradition. This poem is preserved in a 16th century manuscript (1), along with the glosses in 11th century language explaining some of its more obscure references. When it was finally "discovered" by modern scholars, it was named "The Cauldron of Poesy" for its references to poetry being created in three internal cauldrons.<<
Cauldron pictured is: The Gundestrup cauldron is a richly decorated silver vessel, thought to date between 200 BC and 300 AD,
This link has untranslated but there is a font error still may be useful.
TDK / The Druid King