How do we know God's grace is sufficient for our salvation?

The sufficiency of God's grace in salvation is a central theme in Reformed theology, emphasizing that salvation is not based on human effort but entirely on God's initiative and grace. Ephesians 2:8-9 declares that we are saved by grace through faith, which is a gift from God and not of our own works. This means that God’s grace is effective and guarantees our salvation. As noted in Romans 8, nothing can separate the elect from Christ’s love. Thus, the grace of God is sufficient, as it not only justifies but also sustains and preserves believers throughout their lives, culminating in their final glorification.