The following was suggested by the Sermon
of October 30 (the day preceding Devil's Night)
and by yesterday's Beauty, Truth, Halloween.

"The German language has itself been influenced by Goethe's Faust , particularly by the first part. One example of this is the phrase 'des Pudels Kern ,' which means the real nature or deeper meaning of something (that was not evident before). The literal translation of 'des Pudels Kern ' is 'the core of the poodle,' and it originates from Faust's exclamation upon seeing the poodle (which followed him home) turn into Mephistopheles." —Wikipedia

See also the following readings (click to enlarge)—

Hans Primas on Pauli's 'des Pudels Kern'

Suzanne Gieser on Pauli's 'des Pudels Kern'

Note particularly…

"The main enigma of any description of a patternless
unus mundus  is to find appropriate partitions which
create relevant patterns." —Hans Primas, above

"In general, the partition of G  into right cosets
can differ from its partition into left cosets. Galois
was the first to recognize the importance of when
these partitions agree. This happens when the
subgroup H  is normal." — David A. Cox,
Galois Theory , Wiley, 2004, p. 510