Not To Be Confused With
Perseverance (the saints WILL persevere, kept by God) differs from 'eternal security' as often popularly taught (a one-time decision guarantees heaven regardless of life). Arminians and Catholics hold that true believers can finally fall away.
Grounded in texts like John 10:28 ('no one will snatch them out of my hand') and Philippians 1:6. It is preservation as much as perseverance: the saints continue because God keeps them. The warning passages (Heb 6; 10) are read by its defenders as the means God uses to keep his people, and by its critics as real possibilities of apostasy — see assurance and eternal security.