Insecurity means that you do not feel secure and you are missing a sense of security, one that makes you feel safe and protected. There are insecurity quotes which describe emotional and physical insecurities, and we all have them but some people can hide these better than others. Even someone who makes the hottest celebrity lists may still feel some insecurity, especially if their life up until this point has been troubled or traumatic for some reason. Usually insecurity comes from within, but it can start as a result of outward influences. The boy who is picked on for being scrawny may grow up to be in the NFL but he will always feel like the little boy who was bullied for his small size.