How do we know that Jesus is the Just One mentioned in Acts?

The term 'Just One' in Acts 7:52 indeed specifically refers to Jesus Christ, affirming His identity as the Messiah sent to fulfill God's promise. Stephen boldly declares to the council that they are the betrayers and murderers of this Just One, which is a clear identification of Jesus as the one foretold by the prophets. This underscores the theme of rejection and fulfillment prevalent throughout the New Testament, highlighting that historical Israel repeatedly failed to recognize God's redemptive plan revealed in Christ. This prophetic declaration not only affirms Jesus' messianic role but fundamentally points to the consistent witness of Scripture that understands Him as the fulfillments of God's covenant promises.