How do we know that Christ's work is enough for salvation?

We can be confident in the sufficiency of Christ's work for salvation based on scriptural accounts that attest to His perfect obedience and sacrificial death. Romans 10:4 tells us that Christ is the end of the law for righteousness to everyone who believes. Jesus fulfilled every requirement of the law and bore the penalty for sin, as described throughout the New Testament. By His death and resurrection, He declared 'It is finished,' signifying that the payment for our sins was complete. Additionally, Hebrews 1:3 highlights that He purged our sins and sat down at the right hand of the Majesty on high, indicating the acceptance of His atonement. Therefore, His righteousness can be imputed to believers, ensuring our acceptance before God not based on our works but wholly on His grace.