Our greatest teachers aren't people like Jesus or Buddha but are the people in our life that piss us off. Every time a person makes you mad, sad, frustrated etc this should remind you that you have not yet mastered yourself and instead of controlling your emotions you let your emotions control you. But with practice and discipline people can learn to control their emotions regardless of what is happening outside of them and when people are able to do this there able to stay in a positive vibration which helps them attract things or people in their life that is in-sync with their vibration. But when people are mad, angry, sad, frustrated they will attract things and people that are in-sync with their negative vibration. If people can learn to master themselves by controlling their emotions and how they feel doing their best to stay in a positive vibration it would make their world a more positive one.