Pastor Peter…
Few doctrines shape both mind and life like sanctification. As Calvinists study the doctrines of grace, a pressing question arises: Is sanctification monergistic or synergistic? This is no small matter. If we misframe sanctification as synergistic, God does His part, we do ours, we risk smuggling works back into the foundation of our standing before God, blurring justification and inviting either Roman Catholicism, Arminianism, or two-stage justification schemes.
Definitions
Monergism: God’s grace alone acts to save.
Synergism: God’s grace and man’s will cooperate as co-principles toward salvation.
Historically, these terms were first applied to regeneration. The question is whether they should be applied to sanctification.
What the Confessions Say
The Westminster Larger Catechism 35 defines sanctification as “the work of God’s free grace, whereby we are renewed in the whole man after the image of God, and are enabled more and more to die unto sin, and live unto righteousness.”
That phrase, “the work of God’s free grace”-is decisive. Sanctification, like justification, is not earned but given.
What the Classical Theologians Say
Geerhardus Vos: “The gracious work of God whereby the justified believer is renewed by degrees in his whole nature, so that Christ is formed in him and he lives for God in good works” (Reformed Dogmatics, 4:191).
Francis Turretin: Sanctification is “the means by which God delivers the man planted in Christ by faith and justified… more and more from his native depravity and transforms him into his own image” (Institutes of Elenctic Theology, 2:689).
Louis Berkhof: “Sanctification is a divine operation in the soul, whereby the holy disposition born in regeneration is strengthened and its holy exercises are increased” (Systematic Theology, 532–34).
Wilhelmus à Brakel: “We repeat, sanctification is an efficacious work of God. God alone is its cause. As little as man can contribute to his regeneration, faith, and justification, so little can he contribute to his sanctification” (The Christian’s Reasonable Service, 3:4).
Vos again: “We do not sanctify ourselves. It is God who sanctifies” (Reformed Dogmatics, 4:192–94).
Why the Classical Writers Avoided “Synergism” for Sanctification
In the 20th century, some well-meaning theologians began calling sanctification “synergistic” to guard against “cheap grace” and to stress real human effort.
Yet Turretin, Bavinck, Berkhof, and Vos, though fully aware of the term, never described sanctification as synergistic. The word was historically bound to Arminian and Roman Catholic views of grace. Turretin described sanctification as both passive (wrought by God) and active (our Spirit-enabled striving), but he never called it synergistic. The Reformed confessions preferred the clearer language of monergism to guard against misunderstanding.
The Biblical Balance: God Works, We Strive
Philippians 2:12–13 (ESV): “Work out your own salvation with fear and trembling, for it is God who works in you, both to will and to work for his good pleasure.”
The imperative is real: believers are commanded to exert themselves. But the ground is God’s prior, ongoing work. Our striving is genuine, yet it flows directly from the Spirit’s monergistic grace.
John 15:5: “I am the vine; you are the branches.” Branches do not decide to grow. All holiness flows from union with Christ through the Spirit.
Sanctification vs. Good Works
Vos helpfully distinguishes:
Sanctification is God’s work in us; good works are acts of ourselves for Him.
Sanctification is the source; good works are the waters that flow.
Through sanctification something new is brought into us; through good works something already present is expressed outwardly.
Confusing the two reduces sanctification to pietism.
Why This Matters Pastoral
If sanctification depended on my faltering strength, I would never find assurance. Knowing it is God who works in me gives courage when I stumble and hope when progress feels slow.
Sanctification is not our offering to God; it is His gracious gift to us. We strive for holiness not to earn eternal life, but because our Father is holy and we long to reflect Him.
Conclusion
Classical Reformed theology consistently teaches that sanctification is monergistic in its source and power, yet active in us by the Spirit. Our striving is real, but derived from the Spirit’s work. Grace is the beginning, the middle, and the end of salvation.
“Now may the God of peace himself sanctify you completely, and may your whole spirit and soul and body be kept blameless at the coming of our Lord Jesus Christ” (1 Thessalonians 5:23, ESV).
https://heidelblog.net/2025/09/monergistic-sanctification-the-reformed-consensus/#:~:text=Monergistic%20Sanctification%3A%20The,ANTHONY%20FAGGIANO
…and…The Greek word group for “working together” (συν-εργία, sun-ergia) does appear in the New Testament, but Scripture distinguishes carefully between the contexts in which believers “work together with” God and the contexts in which God works alone. The Reformed tradition has therefore been precise about what kind of “synergism” the Bible teaches.
Any form of synergism, which says that God does part of the work of salvation while mankind does the rest, is false. If a person must muster faith, be baptized, join a church, continue in good works, etc., then that is synergism and is clearly unbiblical. No human work or merit can be added to God’s grace without destroying grace (Romans 11:6).
J.