How do we know Christ's work on Mount Calvary is sufficient for salvation?

The significance of Mount Calvary lies in the fulfillment of God's justice and the accomplishment of our redemption. Jesus's declaration 'It is finished' serves as a powerful affirmation that he successfully completed the work the Father assigned him, thus securing salvation for his people. The tearing of the temple veil upon his death symbolizes the end of the sacrificial system, opening the way to God for all who believe. This underscores the doctrine that through Christ, we are justified from all things that the law of Moses could not justify us from, establishing the efficacy of his atonement.