Their appearance may be similar, as in the case of identical twins, but their personalities are quite distinct. It is an interesting experience to visit an automobile factory and watch the cars rolling off the assembly line, each car being identical with the other. While this method certainly makes for business efficiency, this mechanical process does not work with humanity, for each person is a distinct individual, totally separate from every other person. It has been well said that when God makes a person He breaks the mould. Thus there will never be another person just exactly like you or me.
Personality is a difficult thing to define.
It seems to consist of the impression which a person produces on others because of what he is, intellectually, emotionally and volitionally. By means of his intellect a person is enabled to obtain, retain and reproduce knowledge. His will is that faculty which enables him to determine, and to carry out that determination by an act. Therefore we say that the impact which a person makes on others because of his intellect, emotions and will represents his personality. This is all perfectly right and proper.