The Bible splits into two main sections, and understanding how they relate to each other unlocks so much of what makes the Bible trustworthy. Someone once summarized it simply: the Old Testament says Jesus is coming. The four Gospels say Jesus is here. The rest of the New Testament says Jesus will return.
The Old Testament covers creation, the history of Israel, the law God gave His people, and centuries of prophecy pointing toward a coming Savior. It’s not always an easy read. Written thousands of years ago, across genealogies, ancient customs, and laws that don’t always translate simply into modern life, it takes patience. But tucked inside are some of the richest stories, poems, and insights found anywhere. David’s raw honesty in the Psalms. Solomon’s wisdom in Proverbs. The suffering and perseverance of Job. Prophets who confronted kings and spoke truth nobody wanted to hear. It rewards the reader willing to slow down.
More than that, the Old Testament is what gives the New Testament its credibility. Hundreds of years before Jesus was born, prophets described details about the coming Messiah with striking specificity: where He’d be born, how He’d suffer, and why. When those details lined up precisely with a carpenter’s son from Nazareth, it wasn’t coincidence. Peter later wrote that the prophets themselves searched intently to understand “what person or time the Spirit of Christ within them was indicating” (1 Peter 1:11), even before they fully grasped what they were writing about.
The New Testament then tells the story of that promise arriving. The four Gospels, Matthew, Mark, Luke, and John, record Jesus’s life, death, and resurrection firsthand. The rest of the New Testament, Acts through Revelation, carries the story forward: the early church spreading His message, letters teaching believers how to live, and a promise that He’s coming back.
One note worth knowing. Protestants recognize 66 books in the Bible, 39 in the Old Testament and 27 in the New. Catholics recognize 73, including seven additional Old Testament books often called the Deuterocanon or Apocrypha. Both sides agree completely on all 27 books of the New Testament. The difference lies entirely in a handful of Old Testament writings.