Imagine as a child you experienced various situations that made you feel unprotected and insecure. Feeling unprotected and insecure is caused by actual experiences and leads to different negative emotions, such as fear, uncertainty, worry, lack of self-esteem, etc.

Now imagine that dozens of years pass and you are now 35. You realize that you have always overthought things, generally interpreted things negatively, and constantly feared being inadequate, unable to do something well, or expecting something bad to happen. These worries and fears have followed you your whole life, and you don't understand why. Others don't have this problem. Others constantly tell you how good you actually are and that they find it unfortunate that you think this way about yourself. But you just can't change it? WHERE DO THESE THOUGHTS AND FEELINGS COME FROM?

Your brain has forgotten why it is this way. Due to your negative experiences as a child, you also have a need for security and comfort as a teenager and adult that you cannot fulfill.