Foundations · lessons 3
Sin and God's Plan
The problem only God could solve
The question that won't go away
Ana always considered herself a good person. She never stole, never cheated, always helped whoever needed it. But during a sleepless night, a question kept echoing in her mind: 'If I'm so good, why do I feel this emptiness?' Maybe you identify with Ana. Or maybe you are on the other side — someone who knows exactly where they went wrong and carries the weight of it every day. Either way, this study is for you. Because the problem the Bible calls sin is bigger than we imagine — but God's plan to solve it is bigger still.
The word 'sin' carries a lot of baggage. For some, it brings to mind a list of prohibitions. For others, an outdated concept. But in the Bible, sin is something far deeper than 'doing bad things.'
Sin, in its original meaning, is missing the mark. The mark is living in fellowship with God, reflecting His character. When human beings choose to live on their own, without God, they miss that mark. No matter how hard they try to be good — without God, something fundamental is out of place.
Paul does not say 'some have sinned.' He does not say 'the worst have sinned.' He says all. That is the biblical diagnosis of the human condition. No one is good enough to do without God's grace. No moral effort can fix the problem from the inside.
This is not meant to condemn anyone. It is meant to level the field: before God, we all need the same thing — mercy.
What does 'fall short of the glory of God' mean? Show
The Greek word hysterountai means 'to fall behind,' 'to be lacking.' The glory of God is the standard — the full life we were created for. When Paul says that all fall short of that glory, he is saying that no one can, by their own effort, reach the standard of life God designed.
It is like an athlete who trains their entire life and still falls short of the record. The difference here is that it is not a matter of training — it is a matter of nature. We need something that comes from outside ourselves.
This is the first portrait of sin in the Bible. Adam and Eve disobeyed God — and the immediate consequence was not a bolt from heaven. It was fear, shame, and distance. They hid.
That is how sin works to this day. It separates us from God. It creates an invisible barrier between us and the Creator. We feel it as emptiness, guilt, restlessness — that sense that something is missing, even when 'everything is fine.'
But notice something extraordinary in this scene: who went looking for whom? God went after them. 'Where are you?' is not the question of an angry judge. It is the question of a father who has not given up.
Isaiah could not be more direct: sin separates. It is not God who moved away from us — it is we who moved away from Him. And the consequences are real: spiritual loneliness, directionless decisions, a heart that tries to fill with things what only God can fill.
But the story does not end here. If the Bible only showed the problem, it would be a hopeless book. What makes the biblical message unique is that, alongside the diagnosis, comes the remedy.
This verse is a turning point. The first half shows the gravity: sin leads to death — not only physical, but spiritual, the eternal separation from God. The second half shows the hope: God offers eternal life as a gift.
It is not something we buy, earn, or achieve. It is a free gift. God, knowing we could never solve the problem on our own, took the initiative. He traced a plan before the foundation of the world — and that plan has a name: Jesus Christ.
In the next lesson, we will understand how Jesus carried out that plan. But for now, hold on to this: the same God who diagnoses the problem is the God who provides the solution. He does not point out sin to condemn us. He exposes it to save us.
“The discipler must learn to weep with those who weep and to rejoice whenever a soul turns to Christ.”
Pause and reflect
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1
Before this study, how would you define 'sin' in your own words?
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2
Do you identify more with someone who thinks they are 'good enough' or with someone who carries the weight of their mistakes? Why?
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3
What changes in you when you learn that God went after Adam and Eve — and that He does the same with you?
For this week
Read Romans 3:21-26 carefully — it is only six verses, but they contain the heart of the gospel. Then write in one sentence: 'What did God do for me that I could not do for myself?' Bring that sentence to your next Small Group meeting and share it with the group.
To close
“Father, thank You for not giving up on me. I acknowledge that on my own I cannot reach Your standard. I need Your grace. Thank You for coming to find me, even when I hid. Open my heart to understand Your plan and to receive the gift of salvation. In the name of Jesus, amen.”
For the discipler
Objective
Lead the disciple to understand sin as separation from God (not merely a list of moral failures) and present grace as a divine initiative, preparing the ground for the next lesson about Christ's work on the cross.
Difficult questions
- If God knew humanity would sin, why did He create us? Because true love requires freedom. God did not want robots — He wanted children who would choose to love Him. The possibility of sin is the price of freedom. And God already had the rescue plan ready before creation (1 Peter 1:20).
- Why do I pay for Adam's sin? It is not just inheritance — it is experience. All of us, at some point, made the same choice as Adam: to live on our own, without God. Romans 3:23 confirms it: all have sinned. We are not guilty of Adam's sin, but we share the same condition.
- Do children who die go to hell? The Bible indicates that God, in His justice and mercy, welcomes those who had no capacity for conscious choice (2 Samuel 12:23; Matthew 19:14). The just Judge always does what is right.
- If God is good, why is there so much suffering? Suffering entered the world as a consequence of sin — not as individual punishment, but as the reality of a fallen world. God is not the author of evil, but He is working to restore all things (Revelation 21:4-5).
Practical tips
- Be careful not to turn this lesson into a 'condemnation sermon.' The tone is compassionate diagnosis, not accusation. The goal is for the person to recognize their need, not to leave feeling crushed.
- If the disciple expresses heavy guilt, welcome them. Do not minimize, but point to the second half of Romans 6:23 — the free gift. The healing comes in the next lesson.
- Avoid examples of sin that sound like judgment of specific behaviors. Keep the focus on the universal condition: we all miss the mark.
- If someone says 'but I am a good person,' do not confront directly. Ask: 'Even being a good person, do you feel that everything is complete inside?' Let the Holy Spirit bring conviction.
- This lesson ends with intentional tension — the plan is revealed, but the full solution comes in the next lesson. Do not resolve everything now. Let the anticipation build.
Extra material
- Video: Sin — Bible Project
- Leitura: Mere Christianity, chapter 'The Reality of the Moral Law' — C.S. Lewis