How do we know Jesus' salvation is complete?

The completeness of Jesus' salvation is grounded in His perfect fulfillment of the Law and the prophecies concerning Him. He honored the law in our place, fulfilling every requirement to satisfy God's justice on our behalf. Isaiah 42:21 highlights that the Lord is 'well pleased' with Him for this very reason. Furthermore, Jesus' atonement was total, addressing all aspects of our sin, thereby providing complete salvation. This assures us that nothing can be added to His work, as it is entirely sufficient for our redemption.