Core Beliefs are defined by the Counselling Directory as "central beliefs that people hold about the self, others, and the world." (15) These are formed at a younger age and can either be positive or negative. An example of a negative one is "I am unloved", while a positive one could be, "I have worth." When someone is depressed, a majority of the time they live by a negative core, making it hard to change their thinking.
Core beliefs are used as a way to identify negative core ideas about yourself and replace them with positive ones. Most people do this by connecting their thoughts to a common belief and questioning that belief. They ask themselves if it is true and what it could mean about them. This is commonly worked on with therapists who help you identify and change these negative core beliefs. (16)
You should use the core belief skills to reach the root of your depression. Working on identifying negative core beliefs can allow you to see where all your negative thoughts are coming from, and how you can change your perspective. Everyone has negative core beliefs; it is just a matter of working on them individually and with professional help to gain a more positive mindset.
A quick note about these worksheets. I have used a lot of them in an Intensive Outpatient Program (IOP). These worksheets have changed my life in so many ways... They taught me that there are ways I can handle my depression in a healthy manner, while tackling the issue at the core. Even if you are not depressed, these worksheets are a way to build skills that will last you a life time.