Mr. Perplexing,
The concept f reincarnation that pops into your mind is hindu concept.. nothing like the islamic philosophy (which has a spiritual significance).
Here is what you are thinking :“The word “reincarnation” literally means to “come again in the flesh.” The process of reincarnation - continual rebirths in human bodies”
^wrong concept..
To understand the concept of having a revivor and a reformer who is a messenger, Promised Massiah (as) wrote the book that you are quoting.. Its called “aik ghalti ka azala”..this is written to clear out the confusions in the minds of people who take things out of perspective.
I will translate the first few pages of the book (a novice translation).. read them first and in the light of this ask me the same questions again..
“fact is that the words of nabi, mursal (messenger),rusool are present in the blessed revelations endowed upon me;not once by many hundred times. Then how can someone say that these words are not present (in my books).Infact they are present with much more clarity now, then they were before (in earlier years). and in Braheen e Ahmadiyya which has been published 20-22 years ago contails many such words…” (Aik ghalti ka aqala Page 206)
“so in the same way I have been mentioned as a messenger (rusool) in braheen e ahmadiyya in many places. so if someone says that Muhammad :saw is khatimun nabiyyeen, then how can a prophet can come after him. The answer to this is that no prophet either new or old can come in this way. Like when you bring jesus (as) back, and maintain his status as a prophet, and then your belief is that he stays here for 40 years as a prophet and his time exceeds (that of prophethood) from the time of Holy Prophet.No doubt that such a belief is sinfull,and according to the verse “walakin rusoolullah e wa khatimun nabiyyeen” and hadith “la nabiya ba’adi” this is an absolutely false belief. We are totally against such beliefs. And we believe in this verse completely and truely, and when it is said walakin rusoolullah e wa khatimun nabiyyeen”, there is a prophecy in this verse,which our oppnents are not aware of. and which is that the doors of prophecy, after Holy Prophet :saw: are closed untill judgement day. And this is not possible that any hindu or jew or christian or superficial (rasmi??) muslim can prove himself to be a prophet. All the windows of Prophethood are closed except for the window of “seerat e Siddiqui”. which means “fina fir rusool”. So anyone who comes near to God through this window, he is wrapped with the clothes (chaadar??) as a Zilli Nabi, this “chaadar” is actually of the Prophethoot of Muhammad :saw, so such prophethood is not a place of pride (ghairat), as he has achieved not from his own self but from the spring of Prophethood of Muhammad saw. not for his own self but for the grandeur of his Prophet :saw:. That is why his name in the heavens is Muhammad and Ahmad, that means the Muhammad’s :saw: prophethood was bestowed on Muhammad :saw as a result…"
Promised Massiah (as) writes further
"so my being a prophet and a messenger is through being Muhammad and Ahmad and not due to my own self. and this name is given to me because of me being “fina fir rusool”. So the meaning of Khatimun Nabiyyeen (seal of prophets) stays the same. But descent of Isa (as) will definitely cause a difference to the meanings. I must remind you that the meanings of “nabi” according to dictionary are “someone who recieves revelations from God and informant of the Unseen” so when this meaning comes true so does the word “nabi’ is applied as well. and Nabi is bound to be a “rasool” (messenger) as well, because if one is not a “rusool” he cannot get the revelation of the unseen (ghaib e musaffa?).and this verse denies it; “la yazhuru ala ghibihi alaa ahaddam illa min irtarza am minar rusooli” (al-jin 27-28). So if we deny the prophethood after Holy Prophet then it is necessary that we must also believe that this ummat is devoid of any communications (mukaalimaat o mukhatibaat e ilaahiyya) from God. Becasue to whoever these communications are revealed must be a prophet according to “la yazhuru (al-jin 27-28). And in the same way whoever is sent from God will be called a Rusool. The only difference is that there will be no Prophet after Holy Prophet :saw: who will bring any new Shariah, or such a person who is without the intercession (tawassut) of holy Prophet :saw:, and without the state of f"fina firr rusool” as he is named Muhammad and Ahmad in heavens, no one can be given the status of a prophet.” (pages 208, 209)
and on page 209 Promised Massiah (as) has written
“so it must be remembered that I do not deny being a prophet or a rusool accordin to the above condions. And in Sahih muslim Maseeh e maood (promised Massiah) is called as a Nabi. So if a person who recieves the revelations from God can’t be called a nabi, then tell me what should he be called??”
(p.s. All the above are my own translations..very novice and may have many errors.. please refer to www.alfazal.org for the original text to match).