He is Good | Dangers of Sin | Mark 14:66-72 | Coleton Segars
The Dangers of Sin
Mark 14:53–54; 66–72
Culture of Gospel
Share this with someone in your life who doesn’t know Jesus
Every person is chasing something they believe will give them life—peace, approval, success, love—but many of the paths we take slowly lead us somewhere we never intended to go. Jesus offers a different way: a life where our deepest thirst is actually satisfied instead of slowly destroying us.
Introduction: The Danger We Often Don’t Notice
In this passage, we see one of the most heartbreaking moments in the life of Peter. Just hours earlier, Peter had passionately promised Jesus he would never deny Him—even if it meant death.
Mark 14:30–31
“Today—before the rooster crows twice—you will disown me three times.”But Peter insisted emphatically, “Even if I have to die with you, I will never disown you.”
Peter truly believed those words. He loved Jesus and meant what he said. Yet only a short time later, he denies even knowing Him.
Coleton explains that this story reveals two serious dangers about sin that every follower of Jesus must understand. These dangers are not just about Peter’s failure—they reveal how sin works in all of our lives.
1. Sin Is Deceptive
The first thing we see in this passage is that sin rarely announces itself loudly. Instead, it sneaks in quietly and gradually.
Peter does not wake up that morning planning to deny Jesus. In fact, he has the exact opposite intention. He is trying to stay close to Jesus. Mark even tells us he followed Him into the courtyard of the high priest.
Mark 14:54
“Peter followed him at a distance, right into the courtyard of the high priest. There he sat with the guards and warmed himself at the fire.”
Peter wants to stay nearby in case there is a moment when he can help Jesus. But in the process, something subtle begins to happen.
The First Denial
A servant girl recognizes him.
Mark 14:67–68
“You also were with that Nazarene, Jesus,” she said.But he denied it. “I don’t know or understand what you’re talking about.”
Notice what happens here. Peter doesn’t panic or collapse emotionally. It barely registers with him that he has just done the very thing he promised he would never do.
Sin often works exactly like this—it slips under the radar.
The Second Denial
When the accusation comes again, Peter denies it again. Still, he does not seem to recognize what is happening. In his mind, he may be rationalizing it: I’m not denying Jesus to the authorities. I’m just saying I don’t know what this girl is talking about.
But compromise has already begun.
The Third Denial
The third denial is stronger and more aggressive.
Mark 14:71–72
“He began to call down curses, and he swore to them, ‘I don’t know this man you’re talking about.’ Immediately the rooster crowed… Then Peter remembered the word Jesus had spoken… and he broke down and wept.”
In that moment, Peter wakes up to what he has done.
He likely thinks: How did I get here? How did I become the person who did this?
Coleton explains that this is exactly how sin works. It rarely pulls people into massive, dramatic failure immediately. Instead, it leads people there through small compromises that seem harmless.
C.S. Lewis famously described this strategy:
“The safest road to Hell is the gradual one—the gentle slope, soft underfoot, without sudden turnings, without milestones, without signposts.”—C.S. Lewis, The Screwtape Letters
Sin doesn’t start with catastrophic decisions. It begins with small steps:
Not an affair, but hiding a texting conversation.
Not addiction, but scrolling endlessly for comfort.
Not hating your spouse, but constantly focusing on their flaws.
Not deep bitterness, but refusing to forgive a small offense.
These small compromises slowly move our hearts away from God.
Peter later warns the church about this very danger:
1 Peter 5:8
“Your adversary the devil prowls around like a roaring lion, seeking someone to devour.”
Peter writes those words as someone who has experienced exactly how deception work
