Luke tells us plainly why he wrote his Gospel: so that his readers might know the certainty of what they had been taught about Jesus. Alone among the Gospel writers, Luke opens with a formal statement of purpose, and it makes his aim unmistakable — to provide a carefully researched, orderly, and trustworthy account of the life of Christ.
Luke’s own statement of purpose
The Gospel begins: “It seemed good to me also, having traced the course of all things accurately from the first, to write to you in order, most excellent Theophilus; that you might know the certainty concerning the things in which you were instructed” (Luke 1:3–4). Here Luke names his method — careful investigation “from the first” — his form — an orderly account — and his goal — certainty for the reader. He addresses it to Theophilus, whose name means “lover of God,” a specific reader who likely represents the wider audience Luke hoped to reach.
A careful historian
Luke was a physician (Colossians 4:14) and a companion of Paul, not an eyewitness of Jesus himself. So he wrote as a researcher, gathering the testimony of “those who from the beginning were eyewitnesses and servants of the word” (Luke 1:2). His concern for accuracy shows throughout: he anchors his story in the reigns of emperors and governors and gives fuller detail than any other Gospel. Luke also wrote a second volume, the book of Acts, continuing the story into the life of the early church.
A Savior for all people
Beyond providing certainty, Luke wrote to show that Jesus is the Savior of everyone, not one group only. His Gospel gives special attention to those on the margins — the poor, the outsider, women, and the sinner who repents. It is Luke who records the parables of the prodigal son and the good Samaritan, and the angel’s announcement of “good news of great joy which will be to all the people” (Luke 2:10). Luke wanted his readers to see a Savior whose welcome reaches to the ends of the earth.
One story in two volumes
Luke’s purpose reaches beyond his Gospel into its sequel. The book of Acts opens by looking back to “the first book… concerning all that Jesus began both to do and to teach” (Acts 1:1), again addressed to Theophilus. Together, the Gospel and Acts form a single two-part work tracing the good news from Jesus’ birth in Bethlehem all the way to Paul preaching in Rome. This grand scope reflects Luke’s aim: he wanted to show that the message about Jesus was not a local rumor but a well-documented movement of God, spreading from Israel to the ends of the earth, and grounded at every step in real people, places, and events.
Why it still matters
So Luke wrote to reassure and to widen: to give believers solid confidence in what they had been taught, and to reveal a Savior for the whole world. His orderly, compassionate Gospel remains a model of careful witness offered so that readers “may know the certainty” of the faith.
Frequently Asked Questions
Why did Luke write his Gospel?
Luke states his purpose directly: to give an orderly, carefully researched account “that you might know the certainty concerning the things in which you were instructed” (Luke 1:3–4). He wrote to give believers confidence in the truth about Jesus.
Who was Theophilus?
Theophilus, whose name means “lover of God,” is the person to whom Luke addresses both his Gospel and the book of Acts. He appears to be a specific reader who also represents the wider audience Luke hoped to reach.
How did Luke gather his information?
Luke was not an eyewitness but a careful researcher. He drew on the testimony of “those who from the beginning were eyewitnesses,” investigating everything accurately from the first (Luke 1:2–3).
What makes Luke’s Gospel distinctive?
Luke emphasizes that Jesus is the Savior for all people, giving special attention to the poor, outsiders, women, and repentant sinners. He alone records parables such as the prodigal son and the good Samaritan.
Did Luke write any other book of the Bible?
Yes. Luke also wrote the book of Acts as a second volume, continuing the story from Jesus’ ascension into the growth of the early church, making him the largest single contributor to the New Testament.