Sermons on Acts of Apostles | Ignorant Minds | Acts 3:12-20


Ignorant Minds (Acts 3:12-20)

When I was a professor at Heritage Christian University, I taught the apologetics course. As part of that course, I assigned a textbook that my students were to read, and they were then to write a book report. I gave them clear instructions in the syllabus about what should be in the book report and exactly how I wanted them to write it.

Well, one student totally disregarded my instructions and did things as he thought I should have given the assignment. I graded his paper as I had outlined in the syllabus, and this student got a 20. He was furious that he had not only gotten an F but a very low F. He took his paper to the Vice President of Academic Affairs to get Dr. Bill Bagents to force me to change his grade. Bill read the paper and handed it back to the student. Bill looked at him and said, “Dr. Imel is generous. I can’t find 20 points in that paper to give you.”

He did pass my class and got his degree. But this student, love his heart, didn’t know as much as he thought he did.

I’m confident there have been times you have felt pretty ignorant. Maybe it was when you were taking a test or looking at the grade you got on a paper. Maybe it’s on Christmas morning as you’re putting that toy together and what’s in front of you just doesn’t look like the diagram on the instructions. Maybe it’s when you have a hard time following your boss’s instructions because you weren’t listening well. If we’re perfectly honest, we all feel ignorant from time to time.

The Jews should have felt ignorant, for Peter explained that they were very ignorant. The Jews’ ignorance caused serious consequences. We’ve all faced consequences for ignorance—we may have gotten bad grades or we may have embarrassed ourselves.

But the most serious consequence of ignorance is rejecting Jesus as the Christ. Peter’s speech here in Acts makes one point abundantly clear: “Ignorance of Scripture leads to a rejection of Christ.

Scripture (Acts 3:12-20)

There was a man lame from birth who begged for alms at the temple. Peter healed him, and the man began to leap and to walk and to praise God. The people saw this man walking and jumping and recognized him as the man who sat begging at the temple gate. As this man was holding onto Peter and John at Solomon’s Colonnade, the people gathered before them, and Peter addressed them in the words of this morning’s text.

verse 12:

Peter pointed out that ignorance of Jesus led to the crowd’s amazement; he said, “Why does this surprise you? Why do you stare at us as if by our own power or godliness we had made this man walk?” Jewish folks often thought miracle workers were able to do great things because of their own piety that forced God to listen to them. Peter said, “Y’all have it all wrong because you don’t know Scripture and you don’t know Jesus.”

verse 13:

Speaking to these Jews, Peter tied the Lord Jesus back to their forefathers. The God who glorified Jesus is the God of Abraham, Isaac, and Jacob.

Peter called Jesus God’s “servant.” That description comes from Isaiah and was a common designation for the Messiah in Judaism.

Peter pointed out that these Jews were responsible for the death of the Messiah.

verse 14:

They disowned the Holy and Righteous One—the One who is perfect—and asked that a murderer be released to them.

verse 15:

There is certainly a wordplay here; the Jews had killed the author of life. God, however, raised him to life.

verse 16:

Faith in Jesus—the same One the Jews had crucified—made the man completely well.

verse 17:

The people Peter was addressing crucified the Messiah out of ignorance. They should have known him. They had the Scriptures to point them to Jesus. They had the teachings and miracles of Jesus himself to establish his identity. Yet, the people turned a blind eye to the truth and acted in ignorance.

verse 18:

Through the freewill sins of the Jewish people, God was able to accomplish his will. God had spoken of his will through the prophets—the people should have known the Scriptures and have, therefore, recognized Jesus. Yet, their ignorance of the Scriptures led to Jesus’s crucifixion.

verse 19:

Because the people sinned, they needed to repent and turn to God. Both Greek words here can be translated repent. The first word means to think differently; Peter, therefore, called upon the Jews to change their thinking. The second word means to turn around; Peter, therefore, called upon the Jews to change their action. That’s the essence of repentance—a change in thought that leads to a change in action. Peter combined both ideas here to call for complete repentance among the Jews.


Ignorance of Scripture leads to a rejection of Christ.” Because the Jews in the days of our Lord Jesus did not know the Old Testament Scriptures which pointed to Jesus, they rejected and crucified the Messiah. If you are ignorant of Scripture, you will also reject Jesus. How do you respond to ignorance of Jesus?

You need to know Scripture.

Scripture will keep you from being ignorant about the Lord Jesus Christ. Jesus said: “These are the very Scriptures that testify about me” (Jn 5:39). The Apostle John concluded his Gospel with these words: “Jesus performed many other signs in the presence of his disciples, which are not recorded in this book. But these are written that you may believe that Jesus is the Messiah, the Son of God, and that by believing you may have life in his name” (Jn 20:30-31).

If you really want to know Jesus and not be ignorant of him, you need to spend serious time studying the Scriptures. Let me give you a couple suggestions for doing that:

  • Read some prophecies about Jesus. The Jews to whom Peter spoke had the Old Testament Scriptures to point them to the Messiah, but they were ignorant of Jesus. Don’t be ignorant of Jesus! Spend time with the prophecies of our Lord. Psalm 22 and Isaiah 53 are a good place to start. As you read through the Gospels—Matthew, especially—you’ll find the phrase “This was done to fulfill what was spoken by the prophets” over and over. Take a look at those prophecies; see how they match the New Testament record. See what those prophecies teach you about the Lord Jesus.
  • Read through the Gospel of Matthew this week. I’m asking you to read through Matthew because, as he wrote to the Jews, he spent a great deal of time tying prophecies to Jesus—that’s exactly what the Jews in Jerusalem missed. Journal as you read through the Gospel of Matthew and answer some particular questions:
    • What does what I’m reading tell me about my Lord?
    • How does what I’m reading make me love my Lord even more?
    • What attributes do I need to add to my life because of what I’m reading?
    • Do I have any sins I need to remove because of what I’m reading?
    • Why is what I’m reading important?
    • Based on what I’m reading, how should I treat my spouse? My children? My coworkers?

    Get into the Gospel of Matthew and understand Jesus that you might not be ignorant of him!

You need to repent.

Because these Jews had acted in ignorance, Peter told them they needed to repent. You, too, need to repent. “Unless you repent, you too will all perish” (Lk 13:3). We mentioned earlier that Peter used two different words for repent here, and you need to change your thoughts and change your life.

You need to change your thinking about sin.

Think seriously about changing your thinking. “Do not conform to the pattern of this world, but be transformed by the renewing of your mind” (Rom 12:2). Renew your mind. If you really want to renew your mind,

  • Think about how your sin has affected God. Think about how God’s heart breaks when you sin. Think about the high cost God paid—the death of his only Son—to save you from sin. How can you be nonchalant about sin when sin affects God’s heart so deeply?
  • Think about how your sin has affected your family. Think about how your family might be different if you hadn’t committed certain sins. Think about how your sin has affected your spouse, your kids, your parents. How can you be nonchalant about your sin when sin has affected your family so deeply?
  • Think about how your sin has affected your life. Think about how your life would be different if you didn’t struggle with certain sins. Think about how you would have saved yourself some embarrassment. Think about how you could have saved yourself some sleepless nights. How can you be nonchalant about your sin when your sin has affected you so deeply?

You need to change your behavior around sin.

You have a solemn obligation to put sin away from your life. “We were . . . buried with him through baptism into death in order that, just as Christ was raised from the dead through the glory of the Father, we too may live a new life” (Rom 6:4). Ephesians 4:20-24.

What sin do you need to remove from your life? What godly fruit do you need to add to your life? How can the elders and I help you become who you need to be?

Do you need to be buried with Jesus in baptism this morning to be raised to walk in newness of life?

This sermon was originally preached by Dr. Justin Imel, Sr., at Church of Christ Deer Park in Deer Park, Texas.

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