Word study
Plēthō and Plēroō, the two fillings.
One word, looked at closely.
30 September 2026 · 4 min read
If I was already filled with the Spirit, why does the Bible tell me to be filled again?
Because the New Testament uses two different Greek words for "filled", and they are not saying the same thing.
One is a moment. One is a condition. You are meant to have both, and they do different jobs. Most of the confusion about being filled with the Spirit comes from reading one word where the other one is written.
The two words, plainly
Both words come from the same old root meaning "to fill". They grew in different directions.
Plēthō is the sudden filling. The lightning strike. Something arrives all at once, and the person acts immediately. You can usually date it.
Plēroō is the steady filling. The steady rain. Nothing dramatic happens, but over time the ground is soaked through. It is not an event, it is a state you are in.
A moment of lightning does not make the ground wet. Weeks of rain do. And rain does not light anything up. You need both, and neither one does the other's work.
Where you see it
Acts 2:4 and Acts 4:31 are both plēthō. The same believers, filled at Pentecost, are filled again two chapters later.
And when they had prayed, the place was shaken where they were assembled together; and they were all filled with the Holy Ghost, and they spake the word of God with boldness.
Acts 4:31 KJV
They were not topping up something that had run out. A fresh moment arrived for a specific job, which was speaking to the Sanhedrin. Every time plēthō is used of the Holy Ghost, someone speaks or acts straight afterwards. It is equipment for the moment.
Ephesians 5:18 is plēroō.
And be not drunk with wine, wherein is excess; but be filled with the Spirit.
Ephesians 5:18 KJV
Greek puts this in the form used for something ongoing. Not "get filled once", but "keep on being filled". It is the only one of the two that is given as a command, and it is a command about a condition, not an event.
Acts 5:3 is where it gets serious, and it is plēroō.
But Peter said, Ananias, why hath Satan filled thine heart to lie to the Holy Ghost?
Acts 5:3 KJV
Peter does not say Satan struck Ananias. He says Satan filled him, and he uses the slow word. Ananias was not ambushed. He was soaked through, over time, until lying to the Holy Ghost felt like a reasonable thing to do.
What changes
The thing to see is that the enemy works the slow way too.
Nobody wakes up and decides to lie to God. Ananias got there by being filled gradually, in the plēroō sense, by inputs he probably did not notice arriving. That is how error actually enters a believer's life. Not as one bad decision, but as a slow saturation that makes the bad decision feel normal when it finally comes.
Which means a single powerful moment cannot defend you against it. Saturation is only answered by saturation.
And now, brethren, I commend you to God, and to the word of his grace, which is able to build you up.
Acts 20:32 KJV
Being built up is itself a filling. It is slow, daily and unremarkable, which is exactly why it works against something slow, daily and unremarkable.
So the practical weight of this distinction is not academic. It is this: you are always being filled by something. If the Lord is not speaking to you, the devil is speaking to you. There is no in between. What you take in on an ordinary Tuesday is deciding which of the two fillings you are living in.
And the second half of it: when an assignment comes, a conversation, a confrontation, something you have to say, stop and receive the moment before you open your mouth. The steady rain is not a substitute for the lightning. Saturation does not remove your need for fresh equipping, and fresh equipping does not excuse you from saturation.
For your own study
- What has been filling me slowly, that I have not stopped to notice?
- Am I expecting one powerful moment to protect me from something that is building daily?
- When I know a difficult conversation is coming, do I stop and ask for help before it, or only afterwards?
- What would it look like for me to be soaked through this month rather than stirred up this week?
- Where is the Word of God actually getting into my day?
Go deeper
The full research behind this study. Technical, and not required to get the point above.
The shared root
Both verbs trace back to the Proto-Indo-European root pleh₁-, meaning "to fill". From this root, Greek developed a whole word family.
| Word | Strong's | Meaning | Type |
|---|---|---|---|
| pleō / pimplēmi | to fill (primitive verbs) | Ancestor forms | |
| plēthō (πλήθω) | G4130 | to fill (prolonged / reduplicated form) | Verb |
| plēroō (πληρόω) | G4137 | to make full, complete, fulfil | Verb |
| plēthos (πλῆθος) | G4128 | multitude, fullness of number | Noun |
| plērōma (πλήρωμα) | G4138 | fullness, that which fills, completion | Noun |
| plērēs (πλήρης) | G4134 | full | Adjective |
Plēthō (G4130): the acute filling
Definition. A prolonged form of pleō. To fill in a moment, to imbue, to influence, to supply. In the perfect tense, to fulfil (of time, "the days were accomplished").
Grammatical character.
- Frequently aorist (punctiliar action: happens once, decisively)
- Often passive ("was filled")
- Almost always followed by an immediate action verb
Usage. 27 times in the New Testament. When it refers to being filled with the Holy Spirit, it always introduces a specific moment tied to speech, prophecy or bold action.
| Reference | Person | What followed |
|---|---|---|
| Luke 1:15 | John the Baptist (foretold) | Prophetic ministry |
| Luke 1:41 | Elizabeth | Prophesied over Mary |
| Luke 1:67 | Zacharias | Prophesied (Benedictus) |
| Acts 2:4 | The 120 at Pentecost | Spoke in tongues |
| Acts 4:8 | Peter | Answered the Sanhedrin |
| Acts 4:31 | The gathered believers | Spoke the word with boldness |
| Acts 9:17 | Saul (via Ananias) | Immediate ministry begins |
| Acts 13:9 | Paul | Rebuked Elymas |
Also used for sudden emotional overtaking. Luke 4:28 (wrath), Luke 5:26 (fear), Luke 6:11 (madness), Acts 3:10 (wonder and amazement), Acts 5:17 (indignation and envy), Acts 13:45 (envy), Acts 19:29 (the city filled with confusion). The pattern holds: a sudden, decisive filling that overtakes and drives immediate action.
Also used for time being fulfilled. Luke 1:23, 1:57, 2:6, 2:21, 2:22: "the days were accomplished" (aorist passive of plēthō / pimplēmi).
Plēroō (G4137): the saturating filling
Definition. To make full, to complete, to fill up to the brim, to bring to fullness. Also to fulfil a prophecy, a law or a purpose.
Grammatical character.
- Frequently present tense (continuous action)
- Often middle or passive imperative ("keep on being filled")
- Also perfect tense for accomplished states
Usage. 86+ times in the New Testament, in two streams: filling up or being full (of persons, spaces, joy, the Spirit), and fulfilment of prophecy, Scripture, law or purpose.
| Reference | Text | Force |
|---|---|---|
| Ephesians 5:18 | "Be filled (plērousthe) with the Spirit" | Present passive imperative, keep on being filled |
| Ephesians 3:19 | "Filled with all the fulness (plērōma) of God" | Aim of Christian maturity |
| Colossians 2:10 | "Ye are complete (peplērōmenoi) in him" | Perfect passive, settled state |
| Colossians 1:9 | "Filled with the knowledge of his will" | Ongoing saturation |
| John 15:11 | "That your joy might be full (plērōthē)" | Fullness as condition |
| John 16:24 | "That your joy may be full" | Joy brought to fullness |
| Romans 15:13 | "Fill you with all joy and peace in believing" | Continuous supply |
| Acts 13:52 | "The disciples were filled with joy and with the Holy Ghost" | Imperfect, sustained state |
Fulfilment usage. Matthew 1:22, 2:15, 2:17, 2:23, 4:14, 8:17, 12:17, 13:35, 21:4, 27:9 ("that it might be fulfilled which was spoken"); Matthew 5:17 (Christ came to fulfil the law); Luke 24:44; John 19:24, 19:28, 19:36; Romans 13:8; Galatians 5:14.
Side by side
| Feature | Plēthō (G4130) | Plēroō (G4137) |
|---|---|---|
| Root meaning | To fill | To make full, complete |
| Typical tense | Aorist (punctiliar) | Present (continuous) / perfect (completed) |
| Nature of filling | Momentary, decisive, sudden | Sustained, saturating, brought to fullness |
| Result | Immediate action or utterance | Ongoing condition or completion |
| Primary NT usage | Spirit-filled moments for speech | Spirit-filled life; prophetic fulfilment |
| Signature text | Acts 2:4; Acts 4:31 | Ephesians 5:18 |
| Analogy | Ignition | Saturation |
| Metaphor | The lightning strike | The steady rain |
Both are necessary
The initial infilling is plēthō. Pentecost was a plēthō event (Acts 2:4). The personal Spirit-baptism moments in Acts 8, 9, 10 and 19 follow the same pattern. These are datable, definite, and often accompanied by evident signs.
The ongoing Spirit-filled life is plēroō. Ephesians 5:18 commands continuous filling. The verb is present tense. This is not "get filled once", it is "keep on being filled". The Spirit-filled state is normal Christian existence.
Fresh plēthō moments continue within a plēroō life. The Acts 2:4 believers are plēthō-filled at Pentecost and plēthō-filled again in Acts 4:31. Paul in Acts 13:9 is plēthō-filled to confront Elymas, long after becoming a Spirit-filled apostle. Continuous saturation does not exclude fresh acute moments for specific assignments.
They serve different purposes. Plēthō is equipment for the moment: fresh acute empowering for specific speech, prophecy, confrontation or breakthrough. Plēroō is the environment of the life: continuous saturation so that fruit, character and maturity develop.
Two passages to sit with
On Acts 4:31. Luke deliberately chooses plēthō, not plēroō. The disciples were already Spirit-filled from Pentecost. What Acts 4:31 records is a fresh acute filling for a moment of confrontation. Fresh fillings are available and needed, they are always tied to speech and mission, and the text moves straight from "they were filled" to "they spake the word with boldness".
In one line: the plēthō filling is God's equipment for the moment of utterance.
On Ephesians 5:18. Paul does not say get filled once and coast. The verb is present passive imperative: keep on being filled. Verses 19 to 21 show the fruit of continuous filling, which is speaking, singing, giving thanks and mutual submission. A sustained lifestyle, not a single moment.
In one line: plēroō is the atmosphere of the believer's life; every day is a fresh saturation.
Together. The steady life of saturation makes the acute moments of ignition possible. The acute moments of ignition testify to the reality of the steady saturation. Neither replaces the other.
Cross references
- Acts 2:4, plēthō: Pentecost
- Acts 4:8, plēthō: Peter before the Sanhedrin
- Acts 4:31, plēthō: fresh filling for boldness
- Acts 6:3, 6:5, plērēs: "men full of the Holy Ghost" (state)
- Acts 7:55, plērēs: Stephen full of the Holy Ghost, then the plēthō moment of vision
- Acts 11:24, plērēs: Barnabas "full of the Holy Ghost and of faith"
- Acts 13:9, plēthō: Paul confronts Elymas
- Acts 13:52, plēroō (imperfect): disciples being filled with joy and Holy Ghost
- Ephesians 5:18, plēroō: command to keep being filled
- Ephesians 3:19, plēroō: filled with all the fulness of God
- Colossians 1:9, 2:10, 4:12, plēroō: knowledge, completeness, standing
- John 15:11, 16:24, 17:13, plēroō: joy made full
Note that Acts 6:3, 7:55 and 11:24 use plērēs, the adjective, describing the state of being Spirit-full. These are men living the plēroō condition, and out of that condition the plēthō moments come.
Word family notes
Plērōma (G4138), the noun: fullness itself. Christ's fullness (John 1:16), the fullness of the Godhead (Colossians 2:9), the fullness of times (Ephesians 1:10). This is the result of plēroō.
Plēthos (G4128), the "multitude" word. Same root, developed toward number and quantity rather than saturation. Used for crowds, multitudes of fish, multitudes of disciples.
Plērēs (G4134), the adjective "full". Used descriptively of persons and things in a full state. When Scripture calls someone "full of the Holy Ghost" as a description of character (Acts 6:3), this is the plēroō-family word.
Related study threads
- Trace every occurrence of plēthō with the Holy Ghost in Luke and Acts, and note what immediately follows
- Compare Ephesians 5:18 with Colossians 3:16: being filled with the Spirit against being filled with the word
- Study plērōma in Ephesians and Colossians as the theological climax of the filling word family
- Old Testament background: mālē' (מָלֵא, "to be full") in Exodus 40:34-35 and 1 Kings 8:10-11, the glory filling the tabernacle and the temple