I am thinking about the negative impact of talking to one's self excessively, and not enough to other people. Too much talking to yourself and not others puts you in another kind of comfort zone, and we all know how difficult it is to exit those. So, you talk to yourself so much that you don't feel as calm and collected when talking to others. Talking to yourself, you don't have to articulate things perfectly because you already get whatever it is you're getting at. Of course, this isn't so when talking to other people. You have to articulate your thoughts well. And the habit just goes on and on and you get lazier and lazier in your articulation of thoughts and a fear about speaking to others is developed - a fear that they will not understand you. Well, duh. They won't because you've been too accustomed to speaking to yourself in a code developed by you, for you!