All of our actions are ultimately rooted in our deepest desires.  And the bible tells us that our deepest desires apart from Christ are set on the wrong thing.  And that means that everything we do, even if the thing we do is good in and of itself, is evil because our motive is not right, our desire is not right.  That’s the problem that confronts humanity in its freedom.  We may be free to do what we want to do, but we’re not free to do what we ought to do, what God made us to do, apart from God’s intervening grace.  It’s only when God reaches in by grace and changes our desires so that we want him that we reach the kind of true freedom that is found in Christ.  And that is a freedom not only to choose what we want to choose, but to choose as God would have us to choose for his glory and our good (Ligon Duncan, edited transcript).