Why is it important for Christians to trust in grace alone?

For Christians, trusting in grace alone is vital because it removes any reliance on personal merit or works, which cannot satisfy God's justice. The Old Testament example of Moses striking the rock twice signifies the error of seeking to add to the sufficiency of Christ’s sacrifice. Salvation through grace alone, emphasized in Romans 3:28, makes clear that we are justified by faith apart from the works of the law. This understanding not only brings assurance of salvation but also fosters a heart of gratitude and dependence on God's ongoing grace in our Christian lives.