How do we know that salvation is by grace and not by works?

The concept of salvation by grace is thoroughly supported throughout the New Testament, particularly in Ephesians 2:8-9, which states that by grace we have been saved through faith, and that not of ourselves; it is the gift of God, not of works, lest anyone should boast. The nature of sin, as discussed in the sermon, reveals that our sinful condition means we cannot recommend ourselves to God through our deeds. Instead, God unilaterally provides salvation through the merits of Christ's substitutionary death, demonstrating that it is entirely His work and not ours.