Remember that Christianity is an intelligent faith; we don’t have “blind faith”; there are excellent answers available for our questions.
Believing that the Bible is true is a foundational subject for Christians. Let me assure you that there is so much evidence to confirm the accuracy and historicity of the Biblical record, that no one should ever doubt that it is the authoritative revelation from God, true from Genesis to Revelation.
The 66 books of the Bible were written by 40 different men in three languages over a time period of about 1600 years, and yet are unified and harmonious indicating that God was the Ultimate Author. 2 Timothy 3:16 states that “All Scripture is God-breathed . . .” and 2 Peter 1:20, 21 says, “Above all, you must understand that no prophecy of Scripture came about by the prophet’s own interpretation. . . but men spoke from God as they were carried along by the Holy Spirit.”
There are well over 3500 phrases in the Bible indicating a communication from God to man. Writers also claimed that God spoke to them or gave them a vision. Here are just a few examples: Exodus 32:16: “The tablets [of the Ten Commandments] were the work of God; the writing was the writing of God, engraved on the tablets.” Isaiah 8:11: “The Lord spoke to me with his strong hand upon me, warning me. . .” Jeremiah 36:1: “In the fourth year of Jehoiakim son of Josiah king of Judah, this word came to Jeremiah from the Lord.” Romans 3:1&2: “What advantage, then, is there in being a Jew . . . ? Much in every way! First of all, they have been entrusted with the very words of God.” You’ll have to look up the other hundreds of references on your own.
In another article, we’ll discuss what Jesus thought about the Old Testament.
Reference: The Foundations of Christian Doctrine by Kevin J. Conner, Chapter 3