I. Introduction
II. Defeat at Ai
A. God owns the "devoted" things
B. Achan's costly sin
C. Achan's fall: saw, coveted, took, and hid
III. Conclusion and Application
A. Sin is ugly
1. Hurts us
2. Hurts others
3. biggest reason: sin dishonors God
B. "Love Christ and you will have that which caused His death