" More than a decade ago, when my office was in the suburbs of Bethesda, Maryland, I used to enjoy feeding the squirrels in the yard through which my patients walked to reach the waiting room. The little critters—certainly nothing to be afraid of—grew increasingly tame, until some were taking the peanuts from my outstretched hand. I left a can of raw peanuts in my office waiting room to remind me to give them a few handouts each day.
One day, I was sitting with one of my patients in the office when we heard a startling clatter coming from the waiting room. I got up somewhat fearfully to investigate. The door from outdoors into the waiting area was ajar and the can of peanuts knocked to the floor. Encouraged and empowered by my generous freebies, squirrels had invaded the inner sanctum of my office.
That invasion seemed humorous and harmless enough until a few days later, when I heard one of my patients shriek as she came through the pathway to the office. A squirrel had climbed up her pants leg, seeking a peanut handout.
I stopped feeding the squirrels.
Obeying negative legacy emotions is like feeding wild critters. They will take over and grow in power until we have unmanageable beasts trying to overwhelm us from inside our heads. We need to stop feeding the squirrels in our heads. We can start by refusing to listen or respond to them. "

― Peter R. Breggin , Guilt, Shame, and Anxiety: Understanding and Overcoming Negative Emotions