This is John 15:13 for anyone looking. This has always been one of Matt's favorite verses in the Bible and is pretty poignant in light of Percival's death. One of the things Matt's tried to incorporate in the series is that people die and eventually tend to stay dead. Nothing irks him more than a huge bogus "death" of a character. He doesn't consider bringing Lancelot back a violation of this because he came back as a zombie.