Sometimes if you ponder you realize that everything there is, is because, you are. The whole universe, everything is because of you, if you weren't there it wouldn't exist, not for you. Therefore, you are connected to everything in the universe because it is made out of you, because it's not a surrounding but part of you, that is the sole reason why good thing happens when you think and do good and vice versa. It is because when you are positive and have optimism growing inside you it breeds optimism outside too, and all things that happen or are created out of it are good and positive too. The next time you think negative or do something bad, hurt someone remember you are sending it out to the universe and it will stay a part of you forever by staying the part of the universe. Everything good or bad, will always stay connected to you.