Since all Trinitarian Christians use the same source document, there are bound to be similarities, or agreements, on the basic principles of the Gospel. That said, the differences are important, not because they are differences per se, but because they point to correct praxis and beliefs. For example, take the idea of apostolic succession in the context of the Creed (in one holy, catholic and Apostolic Church). Clearly, apostolic succession does not refer only to consecrations of bishops by those whose own consecration reaches back to the apostles. Here, we are also expecting that the newly consecrated bishop is in agreement with the Apostles' teachings and practices. Clearly, the Roman Catholic Church and other heterodox churches that claim to have apostolic succession fail the second test. There is of course a huge problem with many Protestants not paying attention to, or glossing over, John 6. Thus, one ends up with one answer: only the Eastern Orthodox Church is truly the "one holy, catholic and apostolic Church."