They had some debate and told her she was crazy. When she insisted she saw Peter, they responded that it must be his angel. These Christians felt that this person at the door who looked like Peter must be his guardian angel. In other words, they felt Peter had an angel that looked just like him. It is a fascinating theory which the early Christians used to give dignity to the individual.
Every age struggles with self-esteem.
They stress that every person is of such worth to God that He has another one just like them in His presence. Not all Christians accept this theory, and not all Christians believe that every Christian has a special guardian. Calvin felt that angels in general are assigned to minister to man, but not specific angels for specific men. B.B. Warfield felt that the assignments of guardian angels were temporary for a specific time and need, and not a permanent assignment for life. There is a host of different ideas about these beings, but all Christians have had some conviction about them.