When you’re waiting outside a door, you’re waiting outside a door.
When you’re having an argument with your wife, you’re having an argument with your wife. That’s mindfulness.
When you’re waiting outside a door, and you’re spending that time having a mental argument with your wife – that’s not mindfulness.
That’s just plain stupid.
Joschka Breitner, Slowing Down in the Fast Lane: Mindfulness for Managers2