How do we know that mercy is essential for salvation?

The necessity of God's mercy for salvation is deeply rooted in Reformed theology and is articulated in various scriptural passages. Romans 9:15-16 clearly communicates that mercy is entirely at God's discretion; it is not earned or deserved but given to those He chooses. This underscores a fundamental doctrine of sovereign grace—our salvation relies solely on God's initiative through His mercy. Paul's experience, as recounted in 1 Timothy 1:12-14, exemplifies this truth, where despite his former life as a blasphemer, he received mercy and faith through Christ. Therefore, understanding and acknowledging our need for mercy is paramount in the Christian faith, as it perpetuates a reliance on God's grace rather than our own works for salvation.