A Word-Study Chart · Set Apart for God
hagios · holy · set apart · consecrated · wholly other
set apart for God — and, by His Spirit, made like Him
One root · set apart
Beneath both the Greek ἅγιος and the Hebrew קָדוֹשׁ (qadosh) lies one idea: set apart, consecrated, devoted to God — and so, distinct from the common and the defiled. God is holy in the highest sense: He is pure, and He is other, belonging to no category but His own. Holiness is therefore relational before it is moral — it begins with belonging wholly to God, and from that belonging flows a life that reflects His character.
And Scripture holds two things together that we must never split apart: holiness is a gift — we are made holy, set apart, sanctified in Christ — and holiness is a pursuit — we are called to walk it out, being transformed by the Spirit into what we already are.
Holiness begins in God, becomes His call to His people, is given to us as a finished gift in Christ, is worked out as a Spirit-empowered pursuit, and is to be chased after — for it is the very thing in which we will at last see Him.
All holiness flows from, and is measured by, His own.
קָדוֹשׁ קָדוֹשׁ קָדוֹשׁ יְהוָה צְבָאוֹת
qadosh, qadosh, qadosh YHWH tseva'ot
Holy, holy, holy is the LORD of hosts; the whole earth is full of His glory.
No other attribute of God is repeated three times over. His holiness is His pure, blazing otherness — "there is none holy like the LORD" (1 Sam 2:2). Every call to be holy is a call to reflect His holiness, never a standard we invent.
"Be holy, for I am holy" — the call echoes from Sinai to the apostles.
ἅγιοι ἐν πάσῃ ἀναστροφῇ γενήθητε … ἅγιοι γένεσθε, ὅτι ἐγὼ ἅγιός εἰμι
hagioi … genēthēte … hagios
As He who called you is holy, you also be holy in all your conduct, because it is written, "Be holy, for I am holy."
Peter reaches back to Leviticus: God's people are to bear the family likeness. We are "a holy nation" (1 Pet 2:9; Exod 19:6) — set apart to belong to Him and to look like Him in all our conduct, not one corner of it.
Before it is anything we do, it is something done to us.
ἀλλὰ ἀπελούσασθε, ἀλλὰ ἡγιάσθητε, ἀλλὰ ἐδικαιώθητε
apelousasthe, hēgiasthēte, edikaiōthēte
But you were washed, but you were sanctified, but you were justified in the name of the Lord Jesus.
Past tense, done to them: "you were sanctified." Believers are already "saints" — ἅγιοι, holy ones, "sanctified in Christ Jesus" (1 Cor 1:2) — set apart once for all by His offering (Heb 10:10) and His blood (Heb 13:12). Holiness starts as His gift, not our achievement.
We become, in practice, what grace has already made us.
τοῦτο γάρ ἐστιν θέλημα τοῦ θεοῦ, ὁ ἁγιασμὸς ὑμῶν
touto … thelēma tou theou, ho hagiasmos hymōn
For this is the will of God, your sanctification … God did not call us to uncleanness, but in holiness.
Now the present, ongoing work: God's will is our sanctification. We "perfect holiness in the fear of God" (2 Cor 7:1), bear "fruit unto holiness" (Rom 6:22), and are "transformed from glory to glory" by the Spirit (2 Cor 3:18). Not striving in the flesh — yielding to the Spirit who changes us.
Holiness is not optional polish; it is the road to His face.
διώκετε … τὸν ἁγιασμόν, οὗ χωρὶς οὐδεὶς ὄψεται τὸν κύριον
diōkete … ton hagiasmon, hou chōris oudeis opsetai
Pursue peace with all people, and holiness, without which no one will see the Lord.
"Pursue" (diōkō) — chase it down. "The pure in heart … shall see God" (Matt 5:8), and the one who has this hope "purifies himself, just as He is pure" (1 John 3:3). Holiness is not how we earn the gift; it is how the gift comes to fruit — and it ends in seeing Him.
There is a narrow road between two ditches, and both are crowded. On one side, legalism turns holiness into rule-keeping by human effort. On the other, cheap grace treats forgiveness as license to keep on sinning. Both miss real holiness — one trusts the flesh, the other despises the gift.
the first ditch · rules without the Spirit
Reduces holiness to external rule-keeping and self-made restrictions — clean on the outside, proud and unchanged within. Paul calls it "self-imposed religion" with no power against the flesh, and asks the deadly question of all striving: "having begun in the Spirit, are you now being perfected by the flesh?"
the second ditch · grace turned into a cover for sin
Takes the gift of holiness and presumes upon it — turning "the grace of our God into licentiousness." Paul answers it head-on: "Shall we continue in sin that grace may abound? God forbid!" Freedom is never a cover-up for evil; grace that leaves us unchanged was never grasped at all.
Here is the freedom of true holiness: you do not have to manufacture it, and you dare not fake it. In Christ you have already been washed, set apart, made a saint — that is the gift, settled and sure. And out of that settled belonging, the Spirit is at work making you, day by day, into the likeness of the holy God who claimed you.
So we refuse both ditches. We don't grind away in the flesh trying to earn what we've been given, and we don't presume on grace as a license to stay as we are. We yield to the Spirit, pursue holiness as those who already belong to Him, and set our hope on the day we see His face. Heb 12:14 — pursue holiness, without which no one will see the Lord. Become, by grace, what grace has already made you.
The two truths in this study are partners, not competitors. God declares us holy and God makes us holy; we "work out" with fear and trembling exactly what "God works in" us (Phil 2:12–13). The gift grounds the pursuit: because you already belong wholly to Him, you can give yourself wholly to becoming like Him. Collapse either side and you fall into a ditch — all gift and no pursuit drifts toward license; all pursuit and no gift hardens into legalism.
And pursuing holiness is not claiming sinless perfection in this life. Scripture is honest: "if we say we have no sin, we deceive ourselves" (1 John 1:8). Holiness is a real, Spirit-empowered direction and growth — confessing sin, turning from it, and being changed — not a finished flawlessness we pretend to have arrived at. The goal is Christ's likeness; the pace is "from glory to glory"; the completion is the day we see Him.
Scripture speaks of holiness in two tenses. Positional: you are holy — set apart, a saint, sanctified once for all in Christ (1 Cor 1:2; 6:11; Heb 10:10). Progressive: you are being made holy — sanctified day by day as the Spirit conforms you to Christ (2 Cor 3:18; 1 Thess 4:3). The first is the ground of the second. The old maxim captures it: become what you are. You don't strive to get holy in order to be accepted; you walk out the holiness you've already been given.
Holiness is relational before it is moral. At its root, קָדוֹשׁ means set apart — and the first thing we are set apart for is God Himself: to belong wholly to Him. The moral likeness — purity, love, integrity — flows from that belonging; it is the fruit, not the root. This keeps holiness from curdling into mere rule-keeping. We don't behave to earn a place; we live differently because we already belong to the holy One who calls us His own.
| Word | Greek / Hebrew | Sense & key texts |
|---|---|---|
| hagios | ἅγιος | Holy, set apart — Isa 6:3; 1 Pet 1:15–16; Rev 4:8. |
| hagiasmos | ἁγιασμός | Sanctification, the process/state of holiness — 1 Thess 4:3, 7; Rom 6:22; Heb 12:14. |
| hagiazō | ἁγιάζω | To make holy, consecrate, set apart — John 17:17; 1 Cor 6:11; Heb 10:10; 13:12. |
| hagiōsynē | ἁγιωσύνη | Holiness as a quality to be perfected — 2 Cor 7:1; Rom 1:4; 1 Thess 3:13. |
| hagioi | ἅγιοι | "Holy ones," saints — the standard NT name for believers — 1 Cor 1:2; Eph 1:1. |
| qadosh | קָדוֹשׁ | Holy, set apart (Hebrew); root q-d-sh = consecrate — Lev 11:44; 19:2; Isa 6:3. |