I definitely have some insecurities and I've been trying to work on them. I found this article to be very helpful;
"Insecurity rules our lives when we do not find out what has caused our insecurities and when we do not go through the arduous process of undoing them. Of course, some insecurities are temporary and others are deeply seated in repeated trauma or reinforcement of insecurities during our upbringings. Some insecurities are sourced in individuals who get some form of control or satisfaction in inducing insecurity in others. Some come from finding out that we are suddenly in over our heads as we try new experiences and experience challenges and changes in life.
"As a result, like any broad, umbrella like term, the ways in which insecurity affects our lives varies on the lines of the origins, the strength the ongoing reinforcement and the resources that we have in dealing with them.
One of the most profound areas of insecurity lies in fear of engaging in the arts. For some reason, a person can be an uninhibited artistic machine as a small child. Then, around puberty, there are folded arms and shaking heads as the inhibitions set in. Later in life, either a brilliant artist or performer breaks through the chains or a chronic complainer/do nothing develops. There are no comprehensive sets of answers as to why some people get over their periods of insecurity to practice the arts and why others do not, but failure to explore the arts is one of the ways in which insecurity makes our life experience less than it can be...."
- http://www.helium.com/items/1902481-why-do-we-let-insecurity-run-our-lives
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Source: Helium