The Masks that we Wear

So I am new to this whole blog scene and what I know of it is it is a chance for people to be funny and show people only an inkling of their inner thoughts of what they want to be known for. I have deceided that instead I am going to tell you guys the truth; tell you things that I normally would keep to myself and hide beneath sarcasim and Ron Burgandy impressions. So I ask you all why do we feel so insecure about the people we really are? Why are we afraid of being rejected for what we really feel and believe? I am reading this book The Be (Happy) Attitudes by Chrystal Cathedral Pastor Robert Schuller and there was a passage that really stood out to me on this topic:

"We are reluctant to admit our needs because we're afraid that people might really reject us. We're afraid of public embarassment. Actually the problem is even deeper than that; it's a fundamental lack of self-esteem. We fear the lack of dignity that may come with rejection or embarassment." (p.29 "I need help--I can't do it alone")