Any practicing Catholic knows that Jesus Christ is the Lord and Savior of the world. To put it in a nutshell, the Old Testament prophesied the coming of the Messiah and provided the signs by which he could be identified, and the New Testament identified Jesus as the messiah and spoke of his life among the people and his disciples. They’re both books of the bible, but the way they teach Christians is completely different.

• In the Old Testament, we see the vengeful side of God as He seeks to deliver the people from evil. When they disobey his orders and worship idols, he teaches them a lesson and then gives them the Ten Commandments by which they should live. In the New Testament, Jesus seeks to make people change for the better by preaching non-violence and forgiveness.
• The Old Testament lists the laws and the rules that Christians have to observe. In the New Testament, Jesus practices these laws and rules as a way of setting an example for his followers.
• The Old Testament speaks of promises, the New Testament delivers on those promises that God made to Abraham – that a Messiah would be born to save the world and deliver his people from all evil.
• While the Old Testament details God’s interaction with his chosen people who he led out of bondage under the leadership of Moses, the New Testament records the fulfillment of the prophesy of a Messiah being born, and the life and teachings of this savior, Jesus Christ.
• For Catholics, the Old Testament prepares the people for the coming of Jesus Christ and the New Testament fulfills the prophesies that were written in the law of Moses and in the prophets and in the Psalms – that a savior would come and shed his blood for many for the remission of sins.
• The Old Testament shows God’s love for Israel and his anger when his chosen people take to the ways of sin. In the New Testament, God proves his continued love for his people by sending his only son to die for these sins.

In most ways, the New Testament offers a way of redemption for the sins committed by the chosen people of God. In his infinite wisdom, God knows that no matter his wrath, people will be sinners because that is their nature – after all, ever since Eve ate the forbidden apple, sin was a part of humankind. And this is why he decides to sacrifice his only son, Jesus Christ, as the only way to offer redemption to mankind. Every true Catholic knows and realizes this, and by believing in one true God and his son Jesus Christ, they allow themselves to be saved of all their sins.