[[Terry Jones]] has been described by other members of the team as the "heart" of the operation. Jones had a lead role in maintaining the group's unity and creative independence. Python biographer George Perry has commented that should "[you] speak to him on subjects as diverse as [[fossil fuel]]s, or [[Rupert Bear]], or mercenaries in the [[Middle Ages]] or Modern China ... in a moment you will find yourself hopelessly out of your depth, floored by his knowledge."<ref>Perry, George (2007). ''The Life of Python''. p. 40. Pavilion</ref> Many others agree that Jones is characterised by his irrepressible, good-natured enthusiasm. However, Jones' passion often led to prolonged arguments with other group members—in particular Cleese—with Jones often unwilling to back down. Since his major contributions were largely behind the scenes (direction, writing), and he often deferred to the other members of the group as an actor, Jones' importance to Python was often under-rated. However, heHe does have the legacy of delivering possibly the most famous line in all of Python, as Brian's mother Mandy in ''Life of Brian'', "He's not the Messiah, he's a very naughty boy!", a line voted the funniest in film history on two occasions.<ref>{{cite news|url=http://film.guardian.co.uk/features/featurepages/0,,2131880,00.html|title=The last laugh: your favourite 50|work=The Observer|___location=UK|first1=Philip|last1=French|first2=Mark|last2=Kermode|first3=Jason|last3=Solomons|first4=Akin|last4=Ojumu|first5=Killian|last5=Fox|date=22 July 2007|access-date=21 September 2008}}</ref><ref>{{cite news|url=https://www.telegraph.co.uk/news/uknews/1385293/Life-of-Brian-wins-the-vote-for-film%27s-best-laughter-line.html|archive-url=https://web.archive.org/web/20081206011706/http://www.telegraph.co.uk/news/uknews/1385293/Life-of-Brian-wins-the-vote-for-film%27s-best-laughter-line.html|url-status=dead|archive-date=6 December 2008|title=Life of Brian wins the vote for film's best laughter line|work=The Daily Telegraph|first=Sarah|last=Womack|date=19 February 2002|access-date=21 September 2008|___location=London}}</ref> Jones died on 21 January 2020 from complications of dementia.<ref>{{cite news |title=Monty Python star Terry Jones dies aged 77 |url=https://www.bbc.co.uk/news/entertainment-arts-51209197 |access-date=22 January 2020 |work=BBC News |date=22 January 2020}}</ref>
