How do we know that eternal security is true?

Eternal security is a core doctrine rooted in the assurance that God who begins a good work in us will complete it (Philippians 1:6). The apostle Paul's discussion in Hebrews 6:4-6 regarding enlightenment and partaking of the Holy Spirit reinforces the notion that those who have genuinely experienced salvation are firmly secure. These passages indicate that true believers cannot fall away because their salvation is based on God's sovereign choice and grace, rather than their own merit or ongoing works. Furthermore, Romans 8:38-39 states clearly that nothing can separate us from the love of God, emphasizing the permanence and security of our relationship with Him.