I think 1. and 2. are very similar as you describe in that they believe what they pick up and have a difficult time challenging concepts the deeper these sit in

I think 1. and 2. are very similar as you describe in that they believe what they pick up and have a difficult time challenging concepts the deeper these sit in their belief system of everything physical and otherwise. The difference I see with 3. is that people that might identify with this will try to challenge their views in ways that most people won't and in the process often realize how much of their views are based on belief. I disagree with the choice of the word "mystic" greatly because anyone religious, spiritual or not can fit this description. I'm not sure I agree with you on the being comfortable or not part. In my opinion challenging yourself on emotions and feeling comfortable and reflecting on that is a part of this too. Regarding belief and challenging your views: I believe the milky way is a spiral galaxy. I have not done mathematical calculations of the position of stars or the densities of light in the night time sky. Even if I had, these would only be indicators. So far I have only the words of others to base this belief on. I was originally going to go with the example of the earth being round where my only own observation might be the curvature of the earth in an airplane. But I assumed for many this might push them into category 2. so I put it here to challenge those that read this far. [edit/addition]: The examples are supposed to challenge what you consider absolute knowledge/truth and how close it might be to belief.