Ummmm, since I have a very limited knowledge about Christianity(meaning almost none), and I myself are not a christian, could you explain what the impact of the change in Vatcan?
Wow, India a dominion by 1914! Wow
All the changes have not happened yet. The Vatican in the early part of the 20th century was fighting between two schools. One thought that the Bible could stand up to intellectual and scientific scrutiny and, where it did not, this meant that the interpretation of the Bible (not the Bible itself) was wrong. The other faction believed that the Church's interpretation of the Bible took precedence. Pope Leo XIII was of the first school and encouraged modernist thought. Pope Pius X was of the latter school and tried to tear modernist thinking from the Church. Pope Gregory XVII is one of Leo's crowd.
Pope Gregory will believe that the Virgin Mary wants him to unify the Orthodox and Catholic churches (he has a vision). So he will look to displace the differences between them. The Orthodox have a problem with the Pope declaring that, when he speaks from the throne ("ex cathedra"), he is infallible. That is part of papal law and cannot be changed, but it can be explained by further revelation. Thus Gregory will state that while the Pope is still infallible, God does not bless him speaking "ex cathedra" unless he has first acted "in consilium" - that is, sought the consent of all the Orthodox bishops. This links in to the "primus inter pares" idea - that the Pope is equal to all other bishops; however, he is the nominal leader of the Church.
Another argument is over the use of leavened or unleavened bread in the celebration of the Eucharist (called Holy Communion by Protestants). In the Bible, leaven (yeast) is quite often used as a metaphor for sin. Thus, the Western Church did away with using leaven in the Host, but the Eastern Church did not. It might sound like a ridiculous thing to fight over (and I tend to agree it is), but, if His Holiness can convince the Orthodox bishops that he saw a vision of the Holy Virgin, then they would probably be prepared to change.
The Chalcedonian schism came from an argument between East and West over the role that each of the members of the Trinity had. To my mind, it is pathetic semantics, but nonetheless, in the 1100's, it was considered an issue worth splitting the Church over. I believe it probably had more to do with the relationships between the Byzantine Empire and the Franks, but that's beside the point. The East believed, like the West, that God the Father, God the Son, and God the Holy Spirit are one and equal. However, in the wording of the creed, it says,
"We believe in the Holy Spirit, the Lord, the giver of life, who proceeds from the Father and the Son....."
Some felt that this gave the Son priority over the Holy Spirit. The compromise that Pope Gregory XVII will use to heal this rift will be to change the words of the Creed so that it states,
"We believe in the Holy Spirit, the Lord, the giver of life, who proceeds from the Father and through the Son",
thus ensuring that the Holy Spirit cannot be perceived as a second class member of the Trinity. As I said, crazy semantics, like most of the divisions in Christianity. The reason why I know a fair bit about this is that, when I was younger, I was a seminarian, but I realised that I wasn't suited (at that time anyway) to Holy Orders. I could not, in good conscience, endorse Church doctrine on a few issues.
What I am seeing is whether or not I can unite all churches which call themselves Catholic: the Latin or Roman Church, the Eastern Rite Church, the Orthodox Church, the Anglican and Lutheran Churches. So that like the Nicean Creed, they can truly declare that there is "one holy catholic and apostolic church".