How do we know that God keeps His elect eternally secure?

The doctrine of the eternal security of the believer is rooted in Philippians 1:6, which assures us that the God who begins a good work in His people will bring it to completion. This promise underscores God's unfailing commitment to His elect, ensuring that not one will be lost. The nature of God's justice and mercy is such that once He has called someone to Himself, He will not take that calling back. The work of salvation, from election to glorification, is all divinely orchestrated, leaving no room for human failure. In John 6:39, Jesus further affirms this by stating that He will lose none of those given to Him by the Father. Thus, believers can rest assured that their salvation is secured by God's sovereign power rather than their own efforts.