Why is understanding Christ's life important for salvation?

Christ's life is essential to salvation because it demonstrates His perfect obedience to God's law—something we are incapable of achieving ourselves. Hebrews 4:15 highlights that 'we have not a high priest which cannot be touched with the feeling of our infirmities, but was in all points tempted like as we are, yet without sin.' His sinless life qualifies Him as the perfect sacrifice for our sins, as only one who has fulfilled the law may atone for those who have failed to do so. Thus, our salvation hinges on recognizing the significance of His life and how it covers our shortcomings.