What does the Bible say about confidence in salvation?

In Philippians 1:21-26, the Apostle Paul highlights that true confidence stems from Christ alone, emphasizing that our reliance cannot be on our flesh or works. He states, 'For me to live is Christ and to die is gain,' illustrating that our confidence should rest in the completed work of Jesus. If our confidence were based on our actions or religious practices, we would undermine the sovereignty of God in salvation. Instead, Paul teaches that salvation is entirely of the Lord, ensuring that we can trust in His eternal promises and covenant.