Opulence tying to Wisdom as a virtue is something novices often struggle with. Opulence stands Secondary to Nemean pathos and Reverent ethos, thus harboring a subtle confluence of instinct and understanding. It sits half way between Gut and Heart as Solar Plexus, an inner light.
Understand, Knowledge is Sacrosanct and Wisdom is Opulent. Chromatically this makes them complimentaries. They could not possibly be more different and should not be used interchangeably, but possessing both makes for titans among men.