You live in the world of your thoughts. A large portion of that world involves the conversations that you are engaged in with yourself.
Throughout the day you engage in self-talk. You comment to yourself about what you are experiencing now, what you've experienced in the past, and what you might experience in the future.
There are patterns of self-talk that can create needless and excessive distress, anxiety, anger, fear, and worry. By recognizing the patterns of thoughts that make you feel bad and limit you, you become aware of the negative patterns that you need to reduce.
On the other hand, there are patterns of self-talk that create appreciation and gratitude, happiness and joy, positive character traits and attributes, kindness and compassion, hope and encouragement. There is self-talk that enables you to make and reach worthwhile goals, that develop your spiritual elevation, that connects you with the Almighty.
The first step to improving your self-talk is to realize the power of what you say to yourself. The more you appreciate that your self-talk decides the quality of your thoughts, feelings, words, and actions, the more motivated you'll be to upgrade the quality of your self-talk.
([From: Rabbi Zelig Pliskin's book: "Conversations With Yourself", pp.17-8] (Artscroll.com)