It's interesting that you bring up Richard Burton bones because I'm currently watching the tv miniseries epic "Wagner" which originally aired in 1984. That was such a tour de force performance by Burton that I actually get goosebumps from time to time when I watch it.

“Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you.”