A Great Message on the Importance of Doctrine

I am a little behind the times, but I am going through the the videos of this past years Together for the Gospel Conference on the Ligonier web site. I thought that Ligon Duncan's exposition of the importance of doctrine was really great, so I wanted to post the video here, but for some reason blogger wouldn't let me, so the best that I can do is a link: Sound Doctrine: Essential to Faithful Pastoral Ministry (Ligon Duncan)