How can we be sure that Christians are saved by Christ alone?

The assurance of salvation through Christ alone is pivotal in the Reformed theology perspective, where it emphasizes the sufficiency of Jesus' work for our redemption. 1 Timothy 2:5 clearly states that there is one mediator between God and men, the man Christ Jesus, indicating that no other figure or work can bridge that gap. This exclusivity is vital; it means that any reliance on our own works or merits is futile, as only through Christ’s perfect righteousness and sacrifice can we stand justified before God. Furthermore, the unbreakable union believers have with Christ ensures that His redemptive work is fully effective for those whom God has chosen, affirming their security in salvation.