The unity of the biblical message is a compelling reason for why I believe the Bible. The Bible was written over a period of approximately 1,550 years, with at least 40 human writers, most of whom did not know each other and were from varying backgrounds (king, fisherman, tax collector, shepherd, etc.). The Bible was written in various environments (desert, prison, royal court, etc.). Three different languages were used to write the Bible, and, despite covering controversial subjects, it carries one harmonious message. The circumstances surrounding the writing of the Bible would seem to guarantee its fallibility, and, yet, the message from Genesis to Revelation is uncannily consistent.
Another reason why I believe the Bible is its accuracy. The Bible should not be confused with a science textbook, but that does not mean that the Bible does not speak to issues that are scientific in nature. The water cycle was described in Scripture centuries before it was a scientific discovery. The Bible’s true claims concerning world history have also been substantiated. Skeptics used to criticize the Bible for its mention of the Hittite people (e.g., 2 Kings 7:6). The lack of any archaeological evidence to support the existence of a Hittite culture was often cited as a rebuttal against Scripture. In 1876, however, archaeologists discovered evidence of the Hittite nation, and by the early 20th century the vastness of the Hittite nation and its influence in the ancient world was common knowledge.
The scientific and historical accuracy of the Bible is important evidence of the Bible’s trustworthiness, but the Bible also contains many fulfilled prophecies. The 300 messianic prophecies fulfilled by Jesus could not have reasonably been fulfilled by one person unless some greater power was involved. Specific prophecies like Jesus’ birthplace, activities, manner of death, and resurrection demonstrate the preternatural accuracy of Scripture.
Those are some reasons why I believe the claims in the Bible. But the most compelling reason why I believe the Bible is its effect on my life, and the astounding transforming power the word of God has had in my life since I became a Christian 21 years ago.