What does it mean to be preserved forever in salvation?

The doctrine of eternal security is pivotal for understanding salvation in a Reformed context. Paul articulates this in 2 Timothy 2:11-13, where he states, 'If we be dead with him, we shall also live with him; if we suffer, we shall also reign with him; if we deny him, he also will deny us; if we believe not, yet he abideth faithful: he cannot deny himself.' This affirmation expresses that believers' security rests not on their faithfulness, but on Christ’s unchanging faithfulness. Thus, once a person is truly saved, they are secure in Christ for eternity, anchored in God’s promises.