Where do you live?

In order to save money and gas Dylan and I are now taking the train into work. It's taken some getting used to (on my part - Dylan loves it) but we've definately got a nice routine now. One of the many benefits to taking the train is people watching. I've noticed that many people live inside of their heads. Now, I know that some people like to talk on the phone or listen to the radio/mp3 or read a book. That's not what I'm talking about. You can see that they are not looking around them, they don't take any notice of their fellow travelers. It's quite sad. Today it was particularly cold so we stood inside of the heated enclosure waiting for the train. Some people chose to wait on the platform. Most people just barreled out of the door without seeing if anyone was behind them or next to them - just rushing outside to stand and wait. Others would exit to the platform but pause for a brief moment to check to see if anyone was behind them so as not to slam the door in their face. I watched peoples faces. Some people smiled or made eye contact with the other passengers while others were totally blank. The blank faces are what fascinated me. What was going on in their world that had them so deep inside of their heads? Did they have a sick family member? Trouble at their job? Trouble with a significant other or child? Dreaming of warmer days or snow? Struggling with infertility? Wishing for something or someone? For some reason I find these people a challenge. Every now and then I'll catch their eye and smile. Now, it's a scientific fact that if someone smiles at you - you will automatically smile back (if you don't believe me - try it - it's fun) - so I smile and watch them leave their head for a moment. So... where are you living right now? In your heart or in your head?