A self-concept can be defined as those beliefs or notions that one perceives of oneself based on what he//she thinks of himself/herself and what other's beliefs about them.
The image that represents self-concept is a mirror. It is because self-concept begins when we are aware of our self-image. One perceives self-image only based upon what he/she see about oneself.
Just like a mirror helps to help us view our look, appearance, etc, self-concept helps us to view how we look at our self-image.
