The Old Testament is based on the sacrificial death of animals and is dependent on these sacrifices for the temporary forgiveness of sins. For a testament is of force after men are dead: otherwise it is of no strength at all while the testator liveth.” refers to this: “For where a testament is, there must also of necessity be the death of the testator. For a testament is of force after men are dead: otherwise it is of no strength at all while the testator liveth. Hebrews 9:16-17 For where a testament is, there must also of necessity be the death of the testator. It is related to the idea of a last will and testament. A testament is an agreement about what will happen when someone or something dies. A covenant is a special kind of covenant or agreement. The names of these two divisions are very important. However, much of it is written to believers of Christ and to the churches as instruction and guidance in the Christian life. The New Testament is written to present Jesus Christ to all people. Most of the Old Testament was written to the Jewish people and was written to instruct and guide the Jewish people in their obedience to the law and their life as a nation especially chosen by God. The New Testament was written after Jesus had already come. The Old Testament was all written before the coming of Jesus Christ. The two Testaments are also placed before and after a crucial event in the history of mankind. The New Testament was probably written between 40AD and 100AD, a time capable of being spanned by one person's lifetime. The Old Testament was probably written between 1500BC and 400BC, a time of over 1,000 years.
The Old Testament is much older and was written over a longer period of time. The New Testament is made up of 27 books containing a total of 260 chapters. The Old Testament is made up of 39 books containing a total of 929 chapters. That is, the Old Testament makes up about three-fourth's of the entire Bible and the New Testament makes up about one-fourth of the entire Bible. In length alone, the Old Testament is approximately 3 times as large as the New Testament. The Old Testament comes first and is followed by the New Testament. In order to help you understand them better, I will compare them in several ways. The two great divisions of the Bible are the Old Testament and the New Testament. I assume that you are referring to the Old and New Testaments and I will answer your question with this thought.