brain constantly changes

Our brain constantly changes. A lot of it depends on how we perceive things or align our beliefs. A large chunk of it depends on the environment, people around us. 

With the advancement of technology and the constant flow of information, it is easy to change our minds. Sometimes in good, while mostly in a biased manner. 

Get over the echo chamber, meet, read, listen to opinions from externals. It will help in building our belief more rationally. 

I was listening to the Freakonomics podcast and heard Robert Sapolsky talking on the same subject.