Answer: the Bible.
Step-by-step explanation:
The final authority on truth for a Christian is the Bible. Christians believe that the Bible is the inspired word of God, and that it is therefore without error. The Bible is used to guide Christians in their faith and in their daily lives. It is also used to help Christians understand the world around them.
The Bible is divided into two parts: the Old Testament and the New Testament. The Old Testament tells the story of the creation of the world, the fall of man, and the history of the Israelites. The New Testament tells the story of the life, death, and resurrection of Jesus Christ.
Christians believe that the Bible is the most important book in the world. They believe that it is the only source of truth about God and about the world. They also believe that the Bible is the only source of salvation.
The Bible is a complex and challenging book. It is not always easy to understand. However, Christians believe that the Bible is worth studying and that it is essential for living a Christian life.