凯尔特基督教不同于罗马天主教的事实，主要是由于语言障碍和偏远地区。罗马天主教最著名的不同之处之一就是确定了复活节的日期。有好几种方法可以做到这一点，这些方法在几个世纪里已经改变和提炼了。在凯尔特教会成立之后，有一段时间，与欧洲其他地方的联系相对较少，当这种联系重新开始时，罗马天主教会似乎采用了一种不同的制度。几个凯尔特教区实行这个制度，而另一些人维护旧制度。原罪的概念有显著的不同。天主教的圣奥古斯丁认为原罪是由亚当和夏娃在天堂吃禁果造成的，而这种罪恶是传给他们的后代，因此所有的人。为了摆脱原罪，人们不得不生活在圣经里，履行上帝的意志。然而，凯尔特僧侣伯拉纠(Pelagius)却声称，这种原罪是不存在的，一个好的无罪的生命就足以进入天堂。
美国乔治亚大学论文代写:凯尔特基督教
The fact that Celtic Christianity is different to Roman Catholicism in several ways, is largely due to the language barrier and the remoteness of the area. One of the most known differences with the Roman Catholicism is the determination of the date of Easter. There are several ways to do this, and those ways have changed and refined through the centuries. After the establishment of the Celtic Church, there was a time where there was relatively little contact with the rest of Europe and when that contact was renewed, it appeared that the Roman Catholic Church had adopted a different system. Several Celtic parishes practiced this system, while others maintained the old system. There is a striking difference in the conception of the original sin. The Catholic saint Augustine argued that the original sin was caused by Adam and Eve eating the forbidden fruit in Paradise, and that this sin was transmitted to their offspring and therefore all people. To get rid of the original sin, people had to live by the Bible and fulfil God's will. The Celtic monk Pelagius, however, claimed that this original sin did not exist and that a good and sinless life would be enough to go to heaven.
