How do we know that Christ's death is essential for salvation?

The necessity of Christ’s death is rooted in the holiness and justice of God. In Matthew 26, we learn that Christ's suffering was indispensable for atonement, as He took on the sins of His people and faced the divine wrath that those sins deserved. The Father did not send His Son to die casually; He did so because there was no other way to satisfy the requirements of justice. Only through Christ's sacrifice can God be both just and the justifier of those who believe, affirming that our salvation relies solely on His willingness to die in our place.