How do we know salvation is through Christ's crucifixion?

The doctrine of salvation is intricately linked with the crucifixion of Christ. In John 12:32, Jesus declares, 'If I be lifted up from the earth, will draw all men unto me.' This drawing is an allusion to His sacrificial death, which serves as the basis for the justification of sinners. Through His death, He achieved reconciliation, offering life and immortality as Paul states in 2 Timothy 1:10. The emphasis is not on human effort, but solely upon Christ who accomplished the necessary work for our salvation at Calvary. The message throughout Scripture reaffirms that salvation is not by works, but through faith in Christ’s completed work on the cross.