No, those voices in your head aren’t against you.  No, it is not your “ego” talking trash.  No, it is not echoes of past friends and family holding you back.  Yes, it is you.  It is part of you.  These voices are part of you and they are trying to guide you.  Unfortunately, they don’t always know where you are trying to go.  That is the problem.

Listen to those voices but don’t let them control you.  Just like the voices are part of you, you are the only one responsible for deciding which voice you listen to.  You can also listen to different voices throughout the day.