Oh my gosh! Why wouldn't Libertie's mother NOT be guarded & disciplined? I remind myself this is Civil War era with slaves, the Underground Railroad, totally racism. Imagine what a woman - a BLACK woman - had to do to "do anything" must less become a doctor. If she had been WARM & FUZZY I don't think I could believe that characteristic - Maybe there are mothers who can achieve both unconditional love & the desire to see a daughter accomplish a professional life but that would be an entirely different story line. The author had to depict a strong willed, harsh mother who although she loved her daughter, her way of expressing it was through ambition goals.