Feelings are not facts; you can change your feelings by changing your thinking.
If you’re willing to invest a little time in yourself, you can learn to master your moods more effectively, just as an athlete who participates in a daily conditioning program can develop greater endurance and strength.
What is the key to releasing yourself from your emotional prison?
Simply this: Your thoughts create your emotions; therefore, your emotions can not prove that your thoughts are accurate. Unpleasant feelings merely indicate that you are thinking something negative and believing it. Your emotions follow your thoughts just as surely baby ducks follow their mother.
Paraphrased from Tom Butler-Bowdon book, 50 Psychology Classics on David D. Burns book Feeling Good:The New Mood Therapy.