You have not understood my reply.
What is the meaning of human rationality? Does it mean
What ever the human being says, rational (Reasonable) or irrational (Reasonless), should not be accepted or
Whatever reasonably said by the human being should not be accepted.
If you take the first case, since you are a human being, what ever you say should not be accepted, whether you say reasonable or reasonless. If it is the second case, you should be accepted because whatever, you said is reasonless. Then you should be a mad person because only mad people speak reasonless. If you say that you are not mad person, then you should have spoken reasonable, in which case you should not be accepted, since, a reasonable saying of the human being should not be accepted according to the above version (b).
You say that God should not be introduced into a human being. Then you are not a true Christian because Christians believe that God is introduced into the human being just like the blood of father is introduced into the son. Christian believes that Jesus is the son of the Godfather. If you say that Jesus is only messenger of God and not the Son of God, then you are not a Christian and you belong to Islam. Islam says that a messenger is not Son of God but he is only a servant of God. At this point only Christianity separated from Islam.
Originally both Islam and Christianity were one religion only. Islam treated Jesus as the messenger like Mohammed. Christianity is separated from Islam because they treated Jesus, closely related to God like a son to his Father. Infact Christians of higher order believe Jesus directly as God because Jesus told the same "I and my Father are one and the same". This saying proves clearly that God and the human incarnation are one and the same. Therefore, being a true Christian, you should accept that God enters the human being or even temporarily becomes the human being. In both the cases, God either enters or pervades all over the human being. In the case of human incarnation, if you deny both these possibilities, then your Christianity becomes Islam and you are not at all the Christian because you are denying the very fundamental of the Christianity.
In Hinduism all the three concepts are present
1. Advaita of Sankara says that the Lord and the human being become one and the same in the case of human incarnation. Example is Rama. In this case God pervades all over the human body.
2. Visishta Advaita of Ramanuja says that the Lord is present in the heart of human being as in the case of human incarnation, for example Hanuman, who tore His heart and showed Rama in that
3. Dwaita of Madhvacharya says that the Lord is separate in the heaven and sends His servant to this earth as a messenger. For example, Balarama is the Adi Sesha who is the servant of Lord Vishnu in heaven and is the human incarnation.
Thus, Hinduism contains all the three concepts. The first two concepts are called Christianity and the third concept is called Islam. The Mahayana branch of Buddhism worships Buddha in the form of statutes as God or the devotee in whose heart God is present. Infact according to Hinduism Buddha is directly the Lord since he is treated as one of the ten human incarnations of the Lord. Just like Christianity arose from Islam, Buddhism arose from Hinduism. The Heenayana branch of Buddhism treats Buddha as a preacher of divine knowledge and treats Him as an ordinary human being. This concept is the concept of Islam or the concept of Madhvacharya in Hinduism. Thus, Hinduism is a mini model of the entire universal religions. The Science represents atheism. Even this atheism is represented in Hinduism by the sub-religion of Charvaka (Nastika Matam). All the sub-religions of Hinduism are the religions in the world. Whatever is in the world, it is present in Hinduism.
Universal spirituality brings the unity of all religions in the world and thus it brings the unity in all the sub-religions in Hinduism also. Rationality is the essence of the science. The scientist will laugh if you speak any thing irrational (Reasonless). Even in the small matters of this world, we analyze with reason and logic before we follow it and we say that we should not be emotional in taking any decision. Then how much logical we should be in such great spiritual effort, if you want to attain real success?