How do we know that grace makes a difference in salvation?

The critical question of who saves lies at the heart of understanding grace. According to the sermon, the difference between believers and unbelievers is the sovereign grace of God, which alone effects salvation. Romans 11:6 states that if it is by grace, it cannot be based on works, otherwise grace would no longer be grace. This shows that grace not only ensures that God receives glory for salvation, but it also serves as the definitive factor in distinguishing the saved from the lost. The examples of Peter and Judas illustrate that despite their similar backgrounds, it was God's grace that made Peter a believer and allowed him to repent, whereas Judas ultimately succumbed to despair.