I realize that our internal voice is not always very nice to us, but I think the internal voice is usually trying to keep us safe. 

That doesn't mean we need to believe everything it says.

I've learned a lot recently about the brain and how it works many of my different radio show guests, but two in particular who came to talk to me were Rick Hanson, and also Don Goewey.  Both have done separate research (and their books are well worth reading) showing essentially that the reptilian brain, which is part of our now bigger and more complex brain, is still on the lookout for physical dangers like saber-tooth tigers and such.   One of the most fascinating by products of this is that we have brains that tend to collect evidence of danger and ignore what is non-threatening. 

I think this connects to our negative internal dialogue and becomes an integral part of the narration that goes on as we attempt to avoid danger and stay safe.   This part of us will tend to bank negative experiences and simply neglect to register positive ones.  This brain which used to be all we had to keep us safe from all kinds of physical dangers, continues to look out for us today in our every day surroundings using its primitive impulses.   

One of the ways we are often told to deal with our internal voices are to shut them up. In fact one common tool used is to turn down the volume in your mind.   Now, you wouldn't want to turn down your danger voice so much that you walked right into the worst of situations.  However, you really also don't need the alarm bells ringing 24/7 either.  So volume control is an important skill when your internal dialogue is filled with negative chatter and danger warnings that lead to feelings of chronic stress.

What I've found is for me it also works to say "Look, there are no lions here, so just calm down."