Author tries to tell us that,its not outer cicumstances which make us unhappy its only our reaction.We react in that way.So its we who is responsible for our unhappiness.We Shouldnt blame.We Cant blame anyone for anything.
Whatever our negative beliefs are,Whether its fear,Anger,Jeoulesy or anything else We produce it So we are going to suffer for it.Outer things have no power on us.Once we understand who we are,We are free of all these nonsense.
Author has given so many insights,Just read them,think them,Understand them & go 'Free'