How is the Council of Nicea related to the liturgy of the Church?
First of all, the Council of the Nicea was a meeting that was arranged to help solve the many disagreements and church doctrines that were alive and well in that century, Some of these church doctrines that the laity and even a clergyman themselves disagreed on was first of all the idea of God being a Trinity. One of the other things that was discussed at this council was the idea of the immortality of the soul And also one of the other things that was discussed at this council was the idea of an eternal hellfire These and many other ideas were discussed at this council of Nicea. After this council the whole idea God being a Trinity were temporarily resolved. So are many other ideas on other issues !