What an excellent interview. If you have chance listen to Kent speak rather then just reading the transcript of interview. The passion when he speaks about "programming" is amazing and impossible to show in transcript.

"...people are now asking the question: "How am I going to do agile development?" and agile development isn't a thing you do, it's an attitude, it's a set of personal values about responding to the real world, being open to the information that is there and being willing to do something about it.

That is agility. Yes, there is a lot of practices that come out of that but to me that is where it starts, it's this attitude. If somebody understood a bunch of practices and tried to do them, you could do agile development without being agile and it's a disaster because you're acting out of harmony with what you really believe when you do that..." - Kent Beck

http://www.infoq.com/interviews/beck-implementation-patterns#