A lot of people experience life as a journey, a very long walk. Imagine, you are making a long walk. It's going well, you're wearing good shoes, you're really up to this walk and everything is going fine. But then suddenly there's this tiny, I mean really tiny small piece of rock, and it's in a place where it shouldn't be: In your shoe. Now, on every step, you feel that little piece of rock. You could take a moment and sit down, take off your shoe, shake it till the rock comes out and move on. But that's not what people do.