Sanctification involves God's attack on our unbelief—our self-centered refusal to believe that God's approval of us in Christ is full and final. It happens as we daily fight (with blood, sweat, and tears-"making every effort") to receive and rest in our unconditional justification. As G. C. Berkouwer said, "The heart of sanctification is the life which feeds on justification."

It is in this context that I've said before how sanctification is the hard work of getting used to our justification. Sanctification, as someone once put it, is not something added to justification. It is, rather, the justified life.

So let's make every effort. Let's work. But let's not make the mistake of thinking that the hard work is anything smaller than daily going back to reality of our justification, allowing it to kill our self-centered unbelief (which is the root of all sin) over and over and over again.

william graham tullian tchividjian (pronounced cha-vi-jin) is the Senior Pastor of Coral Ridge Presbyterian Church in Ft. Lauderdale, Florida. A Florida native, he is a visiting professor of theology at Reformed Theological Seminary and a grandson of Billy and Ruth Graham. Tullian was the founding pastor of the former New City Church which merged with Coral Ridge in April of 2009. A graduate of Columbia International University (philosophy) and Reformed Theological Seminary in Orlando (M.Div.), Tullian is the author of The Kingdom of God: A Primer on the Christian Life (Banner of Truth), Do I Know God? Finding Certainty in Life's Most Important Relationship (Multnomah), Unfashionable: Making a Difference in the World by Being Different (Multnomah) and, most recently, Surprised by Grace: God's Relentless Pursuit of Rebels (Crossway).