Sproul on the Need for the Imputation of Christ's Righteousness

Justin Taylor, on his blog, has posted an old video of R.C. Sproul teaching about our need for more than just the forgiveness of sin but also the alien righteousness of Jesus Christ. It's only 5:37 long, and it gets right to the heart of what the apostle Paul was communicating in 2 Corinthians 5:21. Check it out here.