Having returned from his leave, John Piper is set to speak tonight at Passion 2011 in Atlanta (7PM EST).

The event is sold out, but you can watch it online via their live-stream.

You can also follow along on Twitter, as David Mathis plans to keep it updated throughout the conference with key Piper quotes.

Piper is no stranger to Passion conferences. Here's the list from our Resource Library of messages he has given at their events in the past (not exhaustive):

Passion 97

• Passion for the Supremacy of God, Part 1
• Passion for the Supremacy of God, Part 2
• Building a God-Focused Ministry (Leaders Seminar)

Passion 98

• Did Christ Die for Us or for God?
• God Is Glorified in Us When Christ Is Gain to Us
• Christian Hedonism with Questions and Answers (Leaders Seminar)

OneDay 2000

• Boasting Only in the Cross

OneDay 2003

• A Generation Passionate for God's Holiness

Passion 06

• How Our Suffering Glorifies the Greatness of the Grace of God

Passion 07

• How to Deal with the Guilt of Sexual Failure for the Glory of Christ and His Global Cause
• The Power to Risk in the Cause of Christ (Breakout Session)

Passion 2010

• Is Jesus an Egomaniac?