What assurance do we have of eternal security in salvation?

Eternal security is a foundational doctrine within sovereign grace theology, reflecting the belief that those whom God has saved will be kept secure in that salvation forever. This is assured by various Scriptures that affirm God's commitment and power to uphold His elect. For example, John 6:37-39 states that those who come to Christ will never be cast out, emphasizing the permanence of their acceptance. Moreover, Jude 1:24 speaks of God being able to keep us from falling and presenting us faultless before His glory. Such promises reinforce that salvation is an act of God which cannot be undone, and believers can rest easy in the assurance of His sustaining grace.