Answer: If a person is "really bad" it means that the whole surface has become bad, but still the depth cannot be bad. However bad a person the depth cannot be bad, for goodness is life itself, and a person who is all bad cannot live. The very fact that he is alive shows that there is a spark of goodness. Besides, just as there are various objects, so there are various persons. Some show softness outside, hardness inside; some show hardness outside and softness inside. Some have good in the depth and evil on the surface, and some have evil in the depth and good on the surface, because as many souls there are, so many are the varieties.