How does the transfiguration relate to the concept of salvation in Reformed theology?

In Reformed theology, the transfiguration is pivotal as it underscores the necessity of Christ's work in securing salvation for the elect. The presence of Moses and Elijah signifies the law and the prophets, pointing to Christ as the fulfillment of both. His radiant glory demonstrated through His transfiguration encapsulates the culmination of His mission, which demanded perfect obedience and atonement for sin. This event anticipates His sacrificial death as the means through which God's justice and mercy are harmonized, affirming that salvation is wholly based on God's grace as revealed in Christ’s redemptive act.