Fallen Man as the Origin of the Dual Natures of Good and Evil
As was already explained in the section on the fall of man, man fell while still growing to perfection to become the substantial ideal of creation. As a result, fallen man has come to have the potential for both good and evil. In other words, man, who is still imperfect, contains both the original goodness given by God as well as the evil nature that he inherited from the fallen angel. This evil element from the fallen angel is the original sin.
The proportion of these two natures that individuals have is not always the same. In fallen man, the evil nature is so well developed that it easily manifests itself in his actions. On the other hand, man's foundation of goodness is so imperfect that it has to be constantly encouraged and conscious effort has to be made before it can bear results.