I think these two lines are perhaps the truest things I've read about software development or anything else all day.
Dogmatically applying any set of guidelines as inflexible rules is both silly and against the definition of "agile" as a word and as the original movement. A team should make as much or as little use of a methodology or a mix of methodologies as works best for that team. Anything written in a book or taught in a class is just a starting point for a new team and shouldn't be an end goal.
