Pretend for a moment that you are working on the world’s biggest jigsaw puzzle. Everyone has their own puzzle to work out.
Every person you meet has a piece of your puzzle, some offering it in their open hand, and some hiding it in their pocket. Likewise you have a piece of everybody else’s puzzle, to offer to them as you wish.
Paying careful attention to each person you encounter will make sure you get their piece of your puzzle. Engaging the other person with full consideration will ensure that they get your piece of their puzzle.