The world is of no real importance to Christians at the least of it, and at the most of it the world is outright the enemy of God. Three beliefs are essential to be within the unity of the religion of Christianity and distinguish Christianity from the false religions which wholesale reject all three of the beliefs, and heretical cults that may hold 1 or 2 of these beliefs but neglect the others.
1. Belief in the divine conception of Jesus to Mary when she was a virgin, his life and ministry, his crucifixion for sins, his resurrection and being witnessed by the disciples, his ascension into heaven, and his promise to come again and judge the all people that ever lived. This belief is more thoroughly explained in the Apostle's Creed.
2. Belief in the Trinity doctrine that accurately describes God as being one God in three persons; the Father, the Son (Jesus), and the Holy Spirit. This belief is more thoroughly explained in the Athanasian Creed.
3. Belief in the Bible as a true and holy text and as the primary document of the religion of Christianity that describes the truth about God, humanity, the creation, doctrines, history, and prophecy.