People come into your life for a reason. That is how the old saying goes. You may not understand it at first. You may not ever understand it. Regardless, they walk into your space and time and shake things up. They do not always intend to rock your world. Usually they just like the way it feels to be around you or maybe they have some selfish motivation for their presence. Their motivation is not relevant though because what matters is your response to it. Life is short. People are inherently good. The change they make on our lives: that is up to us.