We believe when a person experiences regeneration by the Holy Spirit (John 3:5,6) and is saved by grace through faith in Jesus Christ (Eph. 2:8,9), he or she is saved for all eternity (John 3:16,36;10:27-30).
That salvation and the ensuing security of the believer is based upon the finished work of Jesus Christ (1 Pet. 1:18-21). Eternal security does not mean there won’t be ups and downs in a Christian’s spiritual life (Rom. 7:18-25), but “that He who has begun a good work in you will complete it until the day of Jesus Christ.” (Phil. 1:6 NKJV). Eternal security applies only to “truly born again believers” in Jesus Christ.