Arminianism: Falling from Grace - Those who believe and are truly saved can lose their salvation by failing to keep up their faith, etc. All Arminians have not been agreed on this point; some have held that believers are eternally secure in Christ – that once a sinner is regenerated, he can never be lost.

Reformed (Calvinism) :Perseverance of the Saints - All who are chosen by God, redeemed by Christ, and given faith by the Spirit are eternally saved. They are kept in faith by the power of Almighty God and thus persevere to the end