Your parents and their "parenting" example & upbringing and your basic child-education forms your basic discipline, not your religion or the lack of having one.
If people start to claim they have found more discipline, because they found God/Allah and read the Bible/Koran, or by claiming they are Atheist, I would judge them being completely stupid.
If people start to claim they have found more discipline, because they found God/Allah and read the Bible/Koran, or by claiming they are Atheist, I would judge them being completely stupid.