How do we know that Christ's death is important for Christians?

The importance of Christ's death to Christians is underscored throughout Scripture. In Philippians 2:8-9, it is noted that 'he humbled himself and became obedient unto death, even the death of the cross,' which leads to His exaltation. This obedience allows believers to be reconciled to God. Moreover, Hebrews 2:9 states that Jesus, who was made lower than the angels for the suffering of death, is now crowned with glory and honor. His death was necessary to allow a multitude of chosen sinners to be sanctified and glorified with Him. Therefore, the Christian faith hinges on the understanding that without Christ's atoning sacrifice, there would be no means of forgiveness or eternal life, solidifying its necessity for the believer's relationship with God.