Encountering the Triune God: Isaiah’s Vision and Forgiveness

God has revealed himself as Father, Son, and Holy Spirit, one God in three persons. Genesis gives an early glimpse of that reality: God creates, the Spirit hovers over the waters, and God speaks the Word that later becomes flesh and dwells among humanity. The word Trinity may not appear in the Bible, but God has made his nature known. Other ideas of God may try to make the mystery easier to handle, but Christians worship the God who has revealed himself as Father, Son, and Holy Spirit.

Isaiah 6 gives a picture of this God that is bigger than human ideas of power. Isaiah sees the Lord high and exalted, seated on a throne, with the train of his robe filling the temple. God created everything that exists, including time itself. Time does not limit God, and therefore neither do the countless prayers lifted up by his people. God has all the time in the world for every person because he made time.

The seraphim call to one another, “Holy, holy, holy is the Lord Almighty; the whole earth is full of his glory.” God is not merely powerful. God is holy: pure, good, righteous, and just. Holiness stands opposite to everything evil, wicked, selfish, greedy, and mean. The holy God also calls his people to be holy, even though sinful desires often seem more enjoyable than goodness and purity.

Isaiah’s response shows what happens when a sinful person comes face to face with God’s holiness. Isaiah cries, “Woe to me. I am ruined,” because he is a man of unclean lips living among a people of unclean lips. His guilt becomes plain in the presence of the King, the Lord Almighty. A sinner does not stand a chance before holiness by personal effort.

God’s response, however, is not to destroy Isaiah but to forgive him. The live coal from the altar touches Isaiah’s lips, and God declares, “Your guilt is taken away and your sin is atoned for.” God himself provides what Isaiah cannot provide. The coal points beyond itself to the full payment made when God the Son became flesh, lived among humanity, suffered, and died on the cross for sin.

God is powerful, holy, loving, forgiving, merciful, and gracious. The Father, Son, and Holy Spirit live in perfect unity and invite forgiven people into that relationship forever. The gospel is the power of God for salvation for everyone who believes.

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Key Takeaways

• 1. God is one and triune The Trinity is not a puzzle invented to make faith complicated. God has revealed himself as Father, Son, and Holy Spirit, and Christian worship receives God as he truly is rather than remaking him into something easier to understand. The mystery does not remove truth; it calls faith to humility before the Godhead. [37:28]
• 2. God created time itself God is not pressed by the clock or distracted by competing needs. The Creator of time can hear every prayer and be fully present with every person without dividing his attention. This reality gives real hope to ordinary people whose lives feel small or overlooked. [43:14]
• 3. Holiness exposes unclean lips Isaiah’s cry of “Woe to me” shows that sin becomes clear in the presence of God’s purity. Unclean lips are not merely careless words but evidence of thoughts, desires, and actions that fall short of holiness. God’s goodness does not flatter human sin; it brings it into the light. [50:51]
• 4. God provides atonement for guilt Isaiah cannot cleanse himself, yet God sends the coal and declares his guilt removed. Forgiveness begins with God’s mercy, not with human self-repair. Christ’s cross shows the full extent of that mercy, where God the Son pays the price for sinners. [54:40]
• 5. The gospel invites eternal relationship The triune God does not forgive merely to cancel a debt and keep people at a distance. God brings forgiven people into fellowship with himself and with one another forevermore. Salvation is life before the holy, loving God, filled with praise, gratitude, and true love.
  
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Youtube Chapters

• [00:00] - Welcome
• [29:55] - Eight Sundays Remaining
• [35:34] - God the Father, Son, and Spirit
• [38:54] - The One True God
• [41:30] - Isaiah Sees the Lord on His Throne
• [42:56] - God Created Time
• [45:15] - Seraphim and the Holy God
• [47:53] - What God’s Holiness Means
• [50:02] - Woe to Me, I Am Ruined
• [53:15] - God’s Loving Forgiveness
• [56:17] - Christ Pays for Sin
• [58:06] - Invited Into God’s Eternal Relationship

Bible Reading

Isaiah 6:1-7

1. “In the year that King Uzziah died, I saw the Lord, high and exalted, seated on a throne; and the train of his robe filled the temple.” [42:02]

2. “Above him were seraphim, each with six wings: With two wings they covered their faces, with two they covered their feet, and with two they were flying.” [45:18]

3. “And they were calling to one another: ‘Holy, holy, holy is the Lord Almighty; the whole earth is full of his glory.’” [46:22]

4. “At the sound of their voices the doorposts and thresholds shook and the temple was filled with smoke.” [50:02]

5. “‘Woe to me!’ I cried. ‘I am ruined! For I am a man of unclean lips, and I live among a people of unclean lips, and my eyes have seen the King, the Lord Almighty.’” [50:51]

6. “Then one of the seraphim flew to me with a live coal in his hand, which he had taken with tongs from the altar.” [53:42]

7. “With it he touched my mouth and said, ‘See, this has touched your lips; your guilt is taken away and your sin atoned for.’” [54:36]

Genesis 1:1-3

1. “In the beginning God created the heavens and the earth.” [36:00]

2. “Now the earth was formless and empty, darkness was over the surface of the deep, and the Spirit of God was hovering over the waters.” [36:18]

3. “And God said, ‘Let there be light,’ and there was light.” [36:23]

John 1:14

“The Word became flesh and made his dwelling among us. We have seen his glory, the glory of the one and only Son, who came from the Father, full of grace and truth.” [36:47]

Romans 1:16

“For I am not ashamed of the gospel, because it is the power of God that brings salvation to everyone who believes: first to the Jew, then to the Gentile.” [59:14]

Observation questions

1. What details in Isaiah’s vision show the Lord’s greatness and authority, including the throne, the robe, the seraphim, and the shaking temple? [42:02]
2. What do the seraphim repeatedly declare about the Lord, and what does their declaration say about the whole earth? [46:38]
3. What does Isaiah identify about himself and his people when he stands before the holy King? [51:16]
4. What actions are taken by the seraphim, and what words are spoken to Isaiah after the coal touches his lips? [53:42]

Interpretation questions

1. Isaiah sees a God who is both high and exalted and also holy. Why does God’s holiness matter just as much as his power when people think about who God is? [47:53]
2. Isaiah’s “unclean lips” point beyond words alone to sinful thoughts, desires, and actions. Why can sinful speech be an important sign of what is happening in a person’s heart? [51:25]
3. Isaiah cannot remove his own guilt; God provides cleansing from the altar. How does this scene help explain why forgiveness must begin with God’s mercy rather than human self-improvement? [55:25]
4. The coal points forward to Christ, the Son of God, who became flesh and gave himself for sinners. How does the cross show both God’s holiness toward sin and his love for sinful people? [56:51]

Application questions

1. God is Father, Son, and Holy Spirit—one God in three persons. When might it be tempting to reshape God into someone easier to understand or more comfortable to follow? What would it look like to receive God as he has revealed himself? [37:35]
2. God created time and is not limited by it. Where do you currently feel rushed, overlooked, or worried that your prayers are too small? How could this truth shape the way you pray this week? [43:35]
3. God’s holiness is pure, good, righteous, and just. Are there patterns of thought, entertainment, speech, or choices that you have treated lightly even though they pull you away from holiness? What is one honest step toward bringing that area into God’s light? [47:53]
4. Isaiah openly admitted, “I am a man of unclean lips.” Are there recent words—spoken in anger, gossip, sarcasm, dishonesty, or harshness—that need to be confessed to God or addressed with another person? [51:25]
5. God does not leave Isaiah in guilt; he declares that Isaiah’s guilt is taken away and his sin is atoned for. When guilt from past sin returns, how can you remind yourself of Christ’s finished payment rather than trying to punish or repair yourself? [54:40]
6. God’s forgiveness invites his people into fellowship with him and with one another forever. How might gratitude for forgiveness change the way you treat fellow Christians, especially someone with whom you find it difficult to be patient or loving? [58:35]
7. The gospel is God’s power for salvation for everyone who believes. Who in your life needs the hope of forgiveness and life with God, and what might be a natural next step to pray for or care for that person? [59:14]