How do we know that salvation comes through Jesus Christ alone?

The assurance of salvation through Jesus Christ alone is rooted in Scripture, as we see in Acts 4:12, which states that there is no other name under heaven given among men whereby we must be saved. This exclusivity is further reinforced through the centrality of Christ's sacrificial work in fulfilling Old Testament prophecies, revealing Him as the fulfillment of God's redemptive plan. Furthermore, believers' response to God’s calling, as seen in passages like John 6:37, assures us that all whom the Father gives to the Son will come to Him, emphasizing the efficacy of His redemptive work.