WATCH: Footage Surfaces of John Allen Chau's Bold Message to Believers
In the video, he's a freshman in college, wearing an American Eagle collared shirt and standing in a make-shift pulpit for a class presentation.
"Can I go?" he asks before launching into a sermon about missions and how believers must be set apart from the world.
The video was posted in 2010, but the world now knows the man preaching: slain missionary John Allen Chau.
The Sentinelese people reportedly killed Chau last month when he arrived on the remote island.
Watch the video to see how this fresh-faced missionary burned with passion for the gospel of Christ.