One of my absolute favorite quotes. I can still remember bringing it up in a conversation I had with a Berkeley professor about keeping an open mind on controversial subjects, and he ridiculing the quote strenuously, opposing Schopenhauer's idea itself!
We were talking abt academic careers crushed by fellow academics not satisfied in disputing theories, but in impugning the sanity of the professionals advancing new discoveries. Specifically, I mentioned the ruined career of Alfred Wegener, the geologist who proposed a plate tectonic subduction zone in the Pacific, and a corresponding expansion zone in the Atlantic. He was ruthlessly ridiculed and ruined, only to have this theories treated as obvious once accurate ocean-floor mapping was possible in the 1950s.
Wegener's case is just one of dozens littering the floor of "turf-based" academics.