why does celie never feel mad

She has learned to accept the world and her place in it and has learned about her own faith and religious beliefs--uniquely hers, they are not the images of God she was taught to accept. Initally a very timid, vulnerable young girl, she is not only raped by her father but also, later, beaten by her husband. But Celie gains confidence and succeeds through the opportunities she takes advantage of, and she learns to love and be loved.

she doesnt value herself and feels that the situation and negative things she encounters is just how it is..Mr has all the power and say so over her well being...this kind of mentality (devaluing of self) was instilled in her from her stepfather Alfonso.