InkTechnique | John Piper on Apologetics and doubt @InkTechnique | Uploaded 12 years ago | Updated 3 hours ago
This clip is taken from the Q&A session of the 2010 Vancouver Regional Desiring God Conference,
The whole video and the other sessions can be found here:
http://www.desiringgod.org/resource-library/conference-messages/by-conference/2010-vancouver-regional-conference