Here I Am, Day 2 — Holiness: Undone (Isaiah 6:3–5 and 1 Peter 1:14–17)

Here I Am · Study 2 of 5 · Holiness

In Study 1 Isaiah saw God, high and lifted up. In this study he sees himself. We’ll read Isaiah 6:3–5 slowly, then let the apostle Peter show what holiness looks like for people who belong to God. Like every study in this series, it has three sections:

• 📖 Study: walk through the passages phrase by phrase: the words, the history, and the truth underneath.
• ✍️ Journal: honest questions with room to write.
• 🛠️ Practice: small, concrete steps for the week.

Have a Bible, a pen and something to write in. Go slowly.

🗺️ Where this study fits

See God. See yourself. Confess. Be cleansed. Say yes. This study is the second move: when the light of a holy God hits you, you finally see yourself as you really are.

📊 The picture we’ll use: the honest report

In this series your heart is pictured as a phone, the control center where your choices get made (Proverbs 4:23). Phones keep a screen-time report. It doesn’t record what you meant to do this week. It only records what you did. Almost everyone who checks it for the first time has the same reaction: that can’t be right.

Your heart has an honest report too. Most of us carry a version of ourselves that’s a little cleaner and more disciplined than the real one. God isn’t fooled by that version, and He isn’t scared off by the real one. Holiness starts the day you stop defending the edited version.

One guardrail: this isn’t about phones being bad. The point is that you can’t see yourself clearly until holy light hits you.

📜 Read it slowly

Read both passages out loud. In Isaiah, notice what comes before verse 5. In Peter, notice what he calls his readers before he tells them to be holy.

✨ Step 1 · What “holy” really means

The Hebrew word is qadosh. Its root meaning is set apart: other, in a category of one. Hannah prayed, “There is no one as holy as Yahweh, for there is no one besides you” (1 Samuel 2:2). But holiness isn’t only God’s otherness. It’s also His perfect purity. Nothing in Him is mixed, hidden or pretending. That’s why Isaiah’s first reaction is not “God is big” but “I am unclean.”

The Greek word Peter uses, hagios, carries the same idea: set apart for God, and clean.

🔦 Step 2 · Nobody accused him

Look at the order. Verses 3 and 4 are all about God: the cry of “holy,” the shaking doorposts, the smoke. Nobody says a word to Isaiah. Nobody points at him. And then verse 5 comes out of his mouth. The light did the exposing.

That’s the difference between holiness and shame. Shame is someone else pointing at you. Holiness is seeing God so clearly that you can’t pretend anymore.

😩 Step 3 · The seventh woe

“Woe is me!” In chapter 5 Isaiah pronounced six woes on the people around him: the greedy, the drunk, the ones who call evil good (5:8–22). He was the prophet, the one pointing out everyone else’s sin. Now, in God’s presence, he turns the word on himself. “Woe” is the cry you’d hear at a funeral. It means “I’m finished.”

💔 Step 4 · “For I am undone”

The Hebrew word, nidmeti, means “I am ruined” or “I am cut off.” Some scholars also hear a related word for being silenced, as if Isaiah’s mouth has been shut. Both fit. The man whose whole job is speaking for God suddenly has nothing to say.

This isn’t low self-esteem. Isaiah isn’t saying he’s worthless. He’s saying that next to this God, his own goodness doesn’t hold together.

👄 Step 5 · “A man of unclean lips”

Why lips? Three reasons, and they all matter:

• Lips were his work. Isaiah was a prophet. His mouth was the thing he used for God, and it was the thing he now saw was dirty.
• Lips had just been used for worship. The seraphim’s lips spoke only “holy, holy, holy.” Next to that, Isaiah heard the difference in his own.
• “Unclean” was a leper’s word. The law said a person with leprosy “shall cover his upper lip, and shall cry, ‘Unclean! Unclean!’” (Leviticus 13:45). Remember the year: the year King Uzziah died, the king who spent his last years with leprosy. Now Isaiah cries that word about himself. The difference is that he says it in God’s presence, and God doesn’t send him away.

Jesus said, “For out of the abundance of the heart, the mouth speaks” (Matthew 12:34). Lips are where the heart shows up.

🏘️ Step 6 · “I live among a people of unclean lips”

Isaiah confesses his own sin first, then admits he’s part of a whole people who share it. Sin is personal, and it’s also shared. We pick up the language, the jokes, the attitudes and the blind spots of the people around us.

👑 Step 7 · “My eyes have seen the King”

This is the reason for everything else in the verse. Isaiah isn’t undone because someone shamed him or because he finally tried harder. He’s undone because he saw the King. And notice the word. Uzziah, the earthly king, is dead. Isaiah has seen the King who doesn’t die.

👨‍👧 Step 8 · Children first

Now Peter. He’s writing to ordinary Christians scattered far from home, many under pressure. And he starts with family, not rules. Before he says “be holy,” he tells them who they are: “children of obedience.”

Holiness in the Bible is not a slave trying not to get caught. It’s a son or daughter growing up to look like their Father. Paul says the same: “For you didn’t receive the spirit of bondage again to fear, but you received the Spirit of adoption, by whom we cry, ‘Abba! Father!’” (Romans 8:15).

🧱 Step 9 · Breaking the old mold

“Not conforming yourselves according to your former lusts as in your ignorance.” “Conforming” means being pressed into a mold. Peter says your old desires had a shape, and you used to fit it without thinking, because you didn’t know any better. Now you know. You don’t have to keep fitting the old mold.

🪞 Step 10 · “Be holy, for I am holy”

Peter is quoting Leviticus 11:44 and 19:2, God’s words to Israel centuries earlier. Two small words carry the weight. “All” (“in all of your behavior”) means holiness isn’t just for church. It’s for your phone, your money, your relationships and your private time. And “for” (“for I am holy”) gives the reason. You’re called to be holy because God is. It’s family resemblance, not a ticket to get in.

🧭 Step 11 · Father and fear in one sentence

Verse 17 ties the whole series together. Peter says Father and fear in the same breath. The God you call Father is also the Judge who doesn’t play favorites. So you live with reverent fear, the same awe Isaiah felt, but as a child, not a stranger. And “foreigners” means you’re living somewhere that isn’t your final home. You’ll look a little different from the culture around you, and that’s expected.

🧩 Putting it together

Isaiah 6:5 and 1 Peter 1 belong together. Isaiah shows that seeing God’s holiness exposes us. Peter shows that God makes His children holy and calls them to live like it. Theologians call this sanctification: God’s work of making His people holy, which begins with Him and then shapes our everyday choices. Underneath it is adoption: you are holy-in-the-making because you belong to a holy Father.

The danger is stopping in the middle. Stop at “woe is me,” and holiness turns into shame. Skip “woe is me,” and holiness turns into pretending. The path goes through honesty and keeps going to cleansing (Study 4) and a new life (Study 5).

Joseph is a picture of holiness when nobody’s watching. Alone in a foreign country, with no one to report him, he refused Potiphar’s wife and said, “How then can I do this great wickedness, and sin against God?” (Genesis 39:9). He wasn’t worried about being caught. He was aware of God.

🚫 What these passages don’t say

• They don’t say you have to feel terrible to be holy. Isaiah’s “woe” lasts one verse.
• They don’t say holiness is earned. Peter’s readers are already children before he gives the command.
• They don’t say holiness is only about outward rules. “All your behavior” includes the heart and the mouth.
• They don’t say God is disgusted with you. He shows Isaiah the truth so He can cleanse it.

Find a quiet place. This is your honest report, written by hand. Nobody else needs to read it. Write what’s true, not what sounds good.

Small steps for the week. Check them off as you go.

• 📝 Write the honest report. If you haven’t done the journal yet, do questions 1 and 2 by hand. That’s the real report.
• 📱 Optional mirror. If it helps, check your phone’s screen-time report privately and compare it with what you guessed. It’s only a small mirror. God’s holiness is the real one.
• 🙏 Bring it to the Father. Read Isaiah 6:5 aloud as your prayer, then 1 Peter 1:14–16. Tell God the truth from your report, and thank Him that He calls you His child anyway.
• 🛑 Stop defending one thing. Pick one thing your report showed you that you’ve been excusing. Stop defending it this week. You don’t have to fix everything.
• 👄 Words review. One evening, look back over the day and ask only, “What did my words show about my heart today?”
• 👀 Look at God longer than at your failures. Read Psalm 99 and Revelation 4 this week, slowly.
• 👥 Share one line. With a trusted friend, share one line from your report, just one. Ask them to pray, not to fix it.

If something painful comes up in this study, don’t carry it alone. Talk to a pastor or mature believer you trust.

📚 Go deeper

• Leviticus 19:1–18: the original “be holy,” and notice how practical it is: wages, the poor, honesty, neighbors.
• Romans 8:14–17: the Spirit of adoption, not fear.
• 2 Corinthians 6:18–7:1: “I will be to you a Father,” then “perfecting holiness in the fear of God.”
• Genesis 39: Joseph, holy when nobody was watching.
• Hebrews 12:5–11: a Father’s discipline, so we share His holiness.
• Psalm 99: “He is holy,” three times.

🗓️ The five studies

The thread under all five: God is my Father. I am His child. So, be holy as He is holy.

Scripture quotations are from the World English Bible (public domain). Words in [brackets] are added to show who is speaking. Hebrew and Greek notes are simplified; for more depth see John Oswalt’s or Alec Motyer’s commentaries on Isaiah.