What is "sticking to your beliefs" keeping you from?

Had some things on my mind that had to do with an overarching theme of the many people I've met that are very opposed to learning or taking in new ideas, perspectives, and experiences. To me, it is common courtesy to explore these things when they are being told to you by other people, but I am learning that is not so common after-all. What stops people from actively listening to others when they could potentially benefit from learning something? -- Watch live at https://www.twitch.tv/iamredjustice