In this book four theologians explain and defend their approaches to perseverance in salvation: Classical Calvinism--perseverance is based on unconditional election and the irresistibility of grace; Moderate Calvinism--"once saved, always saved" denies strict, 5-point Calvinism, yet clings to the fifth point; Classical Arminianism--believers can cease believing and hence fall from grace--but only by a decisive act of apostasy; Wesleyan Arminianism--believers have the freedom to reject Christ and can lose their salvation through unconfessed sin and/or apostasy through unbelief.