Imagine reversing the alignment: Sunnah as the illuminated background and innovation as darkness appearing within it. The first reading compares stars with Sunnah; the reversed mapping changes the part of the picture assigned to each concept.
This is not merely exchanging words. The rhetorical effect changes when a different visual element represents the primary subject. A relation coherent under one mapping may need fresh justification under another.
An analysis of an imagined resemblance should therefore identify which elements correspond, how they are related, and what imaginative transformation makes the relation intelligible.