I can relate to this therapist’s experience of many individuals having a core belief that they are not good enough.  This belief about oneself can lead to perfectionism, self-sabotaging, and people-pleasing behaviors.  How do you prove to yourself that you are good enough? Pay attention to times you are there to support a friend or family member, successes you have at work or school, anything you like about yourself.  Notice when others compliment you or show appreciation for you, and instead of discounting what they say; listen, say thank you, and sit with the inner knowing that the positive things they just said about you are true.