The audio and video of Piper's messages from the DVD "Open Their Eyes" are now online. In the first message Piper considers these 5 questions:

1. What is the gospel?
2. What is lostness?
3. What is conversion?
4. What is the role of people in conversion?
5. What is the role of teaching in conversion?

And in the second message he looks at what doctrines are essential to teaching the whole counsel of God.