How do we know that all of the elect will be saved?

The assurance of the salvation of all elect is founded upon the words of Christ in John 10:28, where He declares, 'I give unto them eternal life; and they shall never perish.' This statement carries with it the promise of eternal security for God's people. Furthermore, it underscores that the elect cannot be deceived or led away from their salvation, as Jesus assures that it is not possible for His chosen ones to finally perish. The doctrine of the perseverance of the saints, outlined in the Reformed tradition, asserts that those truly redeemed will be sustained by God's grace and cannot fall away from their salvation, lending confidence to the certainty that all the elect will be saved.