How do we know that grace is vital for Christians?

The necessity of grace in the life of a Christian is founded on the truth that we are saved by grace through faith, as outlined in Ephesians 2:8-9. Grace is God’s unmerited favor, which allows us to have a relationship with Him despite our sinful nature. Understanding grace shapes the way we live, enabling us to reflect God’s love and mercy towards others. Without grace, our efforts to please God would be in vain, reinforcing that it is not about what we do, but about what Christ has done for us.