Monergism

Monergism is the Reformed teaching that salvation — and especially the new birth — is the work of God alone, with no human cooperation, since fallen man is spiritually dead and can contribute nothing. The Orthodox Church confesses instead synergy: grace always leads and does the saving, but it heals rather than overrides the will, so that the person freely says yes.

For Inquirers

Picture someone drowning, far past saving themselves. Here is one way to tell the rescue. The lifeguard swims out, seizes the limp, unconscious body, and hauls it entirely to shore; the drowning person does nothing, can do nothing, and that is exactly the point — they were as good as dead, and every ounce of the rescue was the lifeguard's. This is monergism, which means "one working": salvation is God's act alone, from first to last, with no contribution from us, because sin has left us spiritually dead, and dead people cannot cooperate in their own raising.

Now here is a second way to tell it. The lifeguard reaches the drowning person and, in reaching them, revives just enough strength in them that they can grasp the offered hand and hold on. The rescue is still entirely the lifeguard's doing — without him they would simply have drowned — but they are not hauled in like a log; they reach back. This is synergy, "working together," and it is how the Christian East tells the story: God's grace always comes first, always does the saving, and would never leave us to save ourselves — but it does not bypass the person. It heals the frozen will just enough that we can freely say yes. The East's worry about the first picture is gentle but firm: if we contribute literally nothing, not even a free "yes," then we are being processed rather than loved — and love, by its nature, cannot be done to a log. Both sides, it should be said, are fighting to protect the same precious thing: that salvation is God's gift and never our achievement.

Overview

Monergism ("one working") holds that regeneration — the new birth — is accomplished by God alone, apart from any human cooperation, and that this new life precedes and produces faith rather than responding to it.
It follows from the Reformed doctrines of total depravity (the fallen will is dead and cannot turn to God) and unconditional election, and is defended to safeguard salvation as pure grace, leaving no room for human boasting (see John Calvin).
The Orthodox Church confesses synergy (synergeia, "working together"): grace is wholly primary and unearned, but it does not override the free will it heals; the person freely cooperates.
Synergy is not Pelagianism (the idea that we save ourselves by our own effort): the cooperation itself is a gift of grace, a healed nature responding, never a wage that is earned.

What it teaches

At its strongest, monergism begins from a stark and serious reading of the Fall. Sin has not merely weakened human nature but killed it: the will is "dead in trespasses," incapable of any movement toward God, so that an unregenerate person can no more choose faith than a corpse can choose to rise. If that is the condition, then any cooperation the sinner might offer is impossible in principle — there is no living will there to cooperate. Salvation must therefore be monergistic: God alone, by a sovereign and irresistible act, regenerates the dead heart, and only then, out of the new life He has unilaterally given, does faith arise as its fruit. Regeneration precedes and causes faith, rather than faith opening the door to regeneration. The doctrine is held with real reverence, and for a reason worth honouring: it means to give God all the glory for salvation and to leave the sinner nothing to boast of, guarding grace against every trace of self-salvation.

Synergy, not monergism

The Orthodox Church shares the same concern to make salvation entirely God's gift. Its confession is synergy — the two working together, with God always first and decisive, rather than the human person reduced to a passive object. Scripture sets the divine and human working side by side in a single breath: "work out your own salvation with fear and trembling," St. Paul commands, and immediately grounds the command in God: "for it is God who works in you both to will and to work for his good pleasure" (Philippians 2.12-13). The very same sentence that tells us to work tells us that our willing and working are themselves God's work in us — which is the whole of synergy in miniature. So too St. Paul can call the apostles "God's fellow workers" (1 Corinthians 3.9), a word (synergoi) unthinkable if the human side were simply inert.

The model of this cooperation is the Mother of God. When the angel announced that she would bear the Saviour, God did not overpower her; in the Church's reading He waited on her free assent, and she gave it: "Behold, the servant of the Lord; let it be done to me according to your word" (Luke 1.38). The Incarnation itself, the hinge of salvation, proceeded through a freely spoken human "yes" — grace inviting, and a person freely answering. That "yes" earned nothing and originated nothing; it received. But it was hers to give, and God sought it.

Strikingly, even St. Augustine — the Father the Reformers most often invoke — describes salvation in terms that are structurally synergistic. Grace, he writes, "operates, therefore, without us, in order that we may will; but when we will, and so will that we may act, [God] co-operates with us."[^aug] The first movement is entirely God's, waking a will that could not wake itself; but once awakened, the will genuinely works with Him. This is precisely the Eastern balance, and it is why the tradition can say, with the modern teachers as with the ancient, that God, all-powerful as He is, "cannot save us without our active participation."[^fa] His arm is not short; He wills to save persons rather than process objects, and a forced love is simply a contradiction in terms.

The Orthodox tradition condemns Pelagianism — the error that we climb to God by our own unaided effort — as firmly as any Reformer. Grace is entirely primary, entirely unearned, and does all the heavy lifting; it restores the will rather than replacing it, so that the healed person can at last do what he was made to do, freely love and freely follow. Monergism, in order to keep salvation God's, makes the person passive. Synergy keeps salvation just as fully God's while leaving the person a person.

Sources

[^aug]: St. Augustine of Hippo, On Grace and Free Will, §17 (New Advent ch. 33) — "He operates, therefore, without us, in order that we may will; but when we will, and so will that we may act, He co-operates with us," expounding Philippians 2.13 ("It is God which works in you, even to will"). Cited here for Augustine's own operating/co-operating-grace formula, which is synergistic in structure; the corpus otherwise flags Augustine with caution on grace and predestination. [^fa]: FatherAlexander.ORG (A. Mileant), The Essence of Christianity — "The Lord is all-powerful… but He cannot save us without our active participation.".