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

The sufficiency of God's grace is central to the Reformed understanding of salvation. As illustrated in Galatians 4:7, we are reminded that 'if a son, then an heir of God through Christ.' This signifies that our standing before God does not depend on our works or rituals but entirely on Christ's finished work on the cross. The grace that pardoned our sins and redeemed us from the law is the same grace that sustains us throughout our Christian journey. It assures us that nothing can separate us from God's love (Romans 8:38-39), reinforcing the idea that grace, once given, is both sustaining and sufficient for our salvation.