Your 'guard dog' sounds like cognitive distortions, which are very unhealthy, I know, I have them too...I am striving to understand them better, and how they limit who I can truly BE
As they limit who YOU can truly be!!!
Perhaps if you see them spelled out and are able to recoginze them, you can recognize what to get rid of, in order to move on with your precious life
Here are the top ten cognitive distortions:
http://forums.psychcentral.com/showthread.php?t=108173