Ferguson's Decalogue

The second table of Ferguson's Decalogue for preachers. Points 8 and 9 particularly noteworthy.

Interestingly for me, Dr. F contradicts a comment I made on a similar topic in my previous post. He says this under point 6,

Spiritual surgery must be done within the context of God’s grace in Jesus Christ.

So far so good. This makes sense. I take this to mean that the theatre must be prepared by laying out the grace in Christ before surgery can begin. But then in the next sentence he says,

Only by seeing our sin do we come to see the need for and wonder of grace.

This seems to be the wrong way round. Surely, light drives out darkness, rather than darkness looking for and welcoming the light.

What say ye?