John 11:25-26 English Standard Version
25 Jesus said to her, “I am the resurrection and the life. Whoever believes in me, though he die, yet shall he live, 26 and everyone who lives and believes in me shall never die. Do you believe this?”
In order to understand this is the oath that was given to justify mankind we must understand the plan and the process spoken to us by God the Father.
The first is that an oath is only as good as the ability of the oath giver to keep the promises of that oath. Considering the enormity of this oath to save us from death, the oath giver has to be God. Therefor one must believe that Jesus Christ is God, or at least the Son of God, One part of the Trinity of God. So things are not as simple as “it’s the good news”.
Secondly it is how we believe that matters.
Romans 10:9-10 English Standard Version
9 because, if you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved. 10 For with the heart one believes and is justified, and with the mouth one confesses and is saved.
We are justified if we believe with our hearts. That is not head knowledge, we cannot reason ourselves to believing Christ. We must take it to heart.
Thirdly and this point is also made in Romans 10:9 we have to confess Jesus Christ to be the Lord of our lives. God does not just wrangle us out of the heard, we must surrender to His Lordship and walk out of this life and into the next under our own power.
The does not mean we save ourselves. Justification and salvation are two different things.
See, it is never just as easy as saying it is the good news.