What does the Bible say about Jesus's death and its significance?

Hebrews 9:16-17 emphasizes that a testament is only effective after the death of the testator. This indicates that Jesus's death was necessary for His will to take effect, allowing the blessings and benefits intended for His people to be fully realized. The Holy Spirit illustrates this concept through human relationships, showing that just as earthly wills require a person to die for them to be enforced, so too did Jesus have to die for His testament to be effective. His death confirmed the will, ensuring believers that all promised blessings are secure and will be executed with His faithful oversight.