Dour is not an attribute I would ever ascribe to John Piper. Perhaps you should look at just one of Piper's sermons - this is a man full of joy.
Excellent point.
I wonder what the daily special is.
LOL!
Oooohhhh....
I would simply quote Paul...
Rom 3:8 And why not do evil that good may come?—as some people slanderously charge us with saying. Their condemnation is just.
Are you serious - or just rabble rousing?
If you are serious, I thought you might be interested in being informed - rather than simply having an opinion...
Does this sound like a guy who encourages sin? 8^)
http://www.desiringgod.org/blog/posts/john-pipers-message-at-passion-2012