For example, when you live your life as a purely private individual you have the tendency to neglect the outside world. I lived through much of high school walking my own path, disregarding the people I brushed shoulders with. Now that I've matured I can empathize with others and see how my actions affect them. In this sense, I am not a purely private individual because what I do affects others, so I share myself with others in how I relate to the outside world. My thoughts are purely private though, for no one knows what I am thinking.
Feelings are purely private also.
The internet and other resources can reveal almost everything about an individual, from their parents' location, their credit cards, the medication they take. Long gone are the days when a person could live alone in the woods out of the governments' eyes and be pure. These days are numbered and the only things pure are feelings.