Hans Hotter

I am finishing my chapters on voice types and am seriously struggling with basses and bass-baritones.   And then I found this.

This example is like nothing else in the world.  It is a young (35?) Hans Hotter singing "Die Frist ist um" from the Flying Dutchman.  Jetzt verstehe ich alles.  You will listen to opera for 50 years as I have and never hear anything so glorious.