Why is believing in the sovereign grace of God important for Christians?

The concept of sovereign grace emphasizes that salvation is a work of God alone, as found in Ephesians 1:4-5, where God’s grace is shown as His purpose fully executed without man’s contributions. This belief provides comfort and security, as it rests on the sufficiency of Christ's sacrifice, ensuring that no one can claim salvation by their own works. It also shifts the focus of the believer's faith entirely onto Christ and His accomplishments, fostering a humble reliance on God's mercy and not on personal merit.