Ain't that the truth. And (if you're doing it right), the older you get the more holes you spot. And, in filling those holes, keep collecting the lightbulbs from over your head when the "erkennen" mallet strikes.
He was quoting me quoting Hegel, talking about the relationship between familiarity and understanding.
Unfortunately English doesn't have the precise distinction that German does, so the translation is a little confusing. To an English speaker "familiar", "known", and "understood" are almost synonymous.