Why is it essential to understand that salvation is by God's will?

The genuine gospel attributes salvation to the sovereign will of God as outlined in 2 Timothy 1:9, which states that He has saved us and called us not according to our works, but according to His own purpose and grace. This concept is crucial for believers because it removes any basis for human boasting regarding salvation. By recognizing that salvation is a gift determined by God's will, we can appreciate the depth of His mercy and grace, ultimately leading to a humble reliance on Him rather than ourselves.