Mindfulness is training your attention to be awake and aware of what goes on inside and outside yourself. It is a sharpening of the senses. Notice what you are creating and adding to your experiences. Notice also what ideas you cling to and also those attachments you are willing to let go. Notice the feelings that arise and dissipate as you decide nothing matters.
What do you sense about your own observation and evolving behaviour in this moment? How does your life perspective (the nature of seeing) shift as you only speak to people who are truly present? What do you see in common with people you encounter and those you don't?