This Lent, preach sin—and the Old Testament

I've been enjoying CCblogger Rachel Hackenberg's Lenten sermon series posts. She offers several, separate ideas: on the question "Who do you say that I am?" (following the Narrative Lectionary's readings from John), on prayer practices, on "Lift High the Cross," on the paintings of Anneke Kaai.

But my favorite is Hackenberg's series on the Revised Common Lectionary's Old Testament readings. The subject is "reclaiming sin." Here are the weekly themes:

Lent 1 (Genesis 2:15-17, 3:1-7). We confess that we crave what we don’t need.