What is the Septuagint?
The Septuagint (LXX) is a Greek translation of the Hebrew Scriptures produced between the 3rd–2nd centuries BC for Greek-speaking Jews in the Hellenistic world, traditionally associated with Alexandria. The Masoretic Text (MT) is the standardized Hebrew textual tradition preserved and vocalized by Jewish scribes known as the Masoretes between the 7th–10th centuries AD, forming the basis of most modern Old Testament translations. In short, the LXX is an ancient Greek translation reflecting earlier Hebrew textual traditions, while the MT is the later authoritative Hebrew recension within Rabbinic Judaism.
The Septuagint version of Book of Isaiah 53 is often assumed to bolster Penal Substitutionary Atonement (PSA). But when you read the Greek closely, the emphasis shifts in important ways.
The Language of Bearing Sin (53:4)
LXX:
“He bears our sins and is pained for us.”
This clearly affirms substitutionary suffering.
But notice what is absent: it does not say God punished him instead of us. It says he bears and suffers because of our sins.
That is compatible with:
- Representative suffering
- Redemptive solidarity
- Sacrificial offering
It is not yet PSA in the later Reformation sense.
Isaiah 53:5 – “Because of” vs. “Instead of”
LXX:
“He was wounded because of our lawless deeds.”
The Greek preposition (dia) commonly means “because of,” not “in place of.”
That is causation language, not necessarily penal exchange language.
PSA requires more than causation — it requires judicial transfer of punishment.
The LXX does not explicitly state that.
Isaiah 53:10 – The Key Difference
Masoretic Text:
“It pleased the LORD to crush him.”
Septuagint:
“The Lord desires to cleanse him from his wound.”
This is significant.
The Greek verb here is about purification/cleansing — not crushing or punitive infliction.
The LXX shifts the focus from:
- Divine retributive action
to - Healing and purification
That weakens a strict penal reading.
The Emphasis on Healing
LXX 53:5:
“By his bruise we were healed.”
The dominant metaphor in the Greek text is therapeutic, not judicial.
The atonement appears restorative and medicinal — not primarily courtroom-based.
Isaiah 53:8 – “In His Humiliation”
LXX:
“In his humiliation his judgment was taken away.”
This does not describe a divine courtroom punishing him.
It portrays unjust suffering — humiliation and miscarriage of justice.
That aligns more naturally with:
- Innocent suffering
- Vindication
- Reversal
rather than divine penal execution.
What the LXX Clearly Affirms
The Septuagint Isaiah 53 affirms:
- The Servant bears sins.
- His suffering benefits others.
- His suffering leads to healing.
- God is involved in the redemptive outcome.
But it does not explicitly state:
- That God vents wrath upon him.
- That punishment is transferred in a strict forensic sense.
- That justice is satisfied through penal equivalence.
Those are theological inferences — not direct statements of the Greek text.
Why This Matters
The New Testament (e.g., Acts of the Apostles 8) quotes Isaiah 53 in its Septuagint form. If one argues that the NT is grounding PSA directly in Isaiah 53, then the argument must demonstrate that PSA is clearly present in the LXX wording itself.
The LXX supports substitutionary and sacrificial themes.
It does not unambiguously support later Reformation penal categories.
A Necessary Clarification
Rejecting a strict PSA reading of the LXX does not mean:
- Denying substitution.
- Denying sacrifice.
- Denying sin-bearing.
It means recognizing that the dominant imagery in the Greek text is:
- Healing
- Cleansing
- Humiliation leading to vindication
- Redemptive suffering
Those themes align more naturally with:
- Christus Victor
- Recapitulation
- Participatory or therapeutic atonement models
The burden of proof rests on anyone claiming the Septuagint version of Isaiah 53 explicitly teaches penal substitution in the developed post-Reformation sense.