“So when Jesus had received the sour wine, He said, ‘It is finished!’ And bowing His head, He gave up His spirit.” John 19:30
When Jesus was hanging on the cross to pay the penalty for the sin of the world, He triumphantly said, “It is finished!” What did He mean when He said this? The Greek word that is translated “finished” is tetelestai. Receipts in New Testament times were stamped with this word which meant that the debt had been paid in full.
All people have sinned against God with their thoughts, words and actions (Rom. 3:23) and deserve to be separated from Him forever (Rom. 6:23; Rev. 20:15). But God so loved the world that He gave His only perfect Son, Jesus Christ, to take the punishment for our sin when He was crucified in our place on the cross (John 3:16; Rom. 5:8) and rose from the dead, proving He is God and had finished the work of paying our sin debt in full (Rom. 1:3-4; I Cor. 15:1-8; I John 2:2).
No amount of our good works can change the fact that we are sinners before a holy God (Isaiah 64:6; Rom. 3:1-20, 23; 4:5; Gal. 2:16). Christ did not make a down payment for our sin when He died on the cross so that we must pay the remainder of our sin debt to God. God does not accept us on the basis of our good life, our keeping of His commandments, our water baptism, or the sacraments we have taken. We are accepted by God on the basis of the full payment for our sin debt to God when Jesus Christ died and rose again on our behalf. God was completely and forever satisfied with Jesus’ full payment for our sin. The verb tetelestai is in the perfect tense. This means Christ made the full payment for our sin debt when He died on the cross and it remains paid in full to the present.
When we communicate the gospel with non-Christians, we must be clear that all people have sinned against God and deserve to die forever in the Lake of Fire (Rom. 3:23; 6:23; Rev. 20:15). No amount of our good thoughts, words, or actions can change the fact that we are sinners before a holy God (Isaiah 64:6). Because Jesus finished paying the penalty for our sins when He died in our place, that means we do not have to work for our salvation (Rom. 4:5; Eph. 2:8-9). All God asks of us is to believe in Jesus and His finished work on the cross as sufficient payment for our sins (John 3:14-15; 19:30). When we do, He gives us everlasting life and forgives all of our sins (John 3:16; Acts 10:43).
Those who are trusting in their good works or in Christ plus their good works to get them to heaven, are telling God the Father that Jesus’ death on the cross failed to pay their sin debt in full. However, since God was forever satisfied with His perfect Son’s payment for the sin of the world (Isaiah 53:11; John 19:30; I John 2:2), we must also be satisfied with what satisfies God. God cannot accept anything we do as payment for our sins because He has already accepted His Son’s payment for all of our sins when He died in our place on the cross.
We can reflect this truth in evangelism by inviting non-Christians to believe or trust in Christ alone, not their good works, to give them a right standing before God (Rom. 4:5; Gal. 2:16) and everlasting life (John 3:15-16; 6:40, 47; 11:25-26) so they will go to heaven when they die.