This document summarizes a lesson about casting down imaginations and having a sound mind. It discusses Paul's declarations in Philippians 4 about not being anxious and letting requests be known to God, which will grant peace. Positive thoughts about true, honest, just, pure, lovely, and praiseworthy things should be focused on. Paul also said he can do all things through Christ. The lesson contrasts requesting things from God with faith versus requesting from man or oneself without peace and focusing on negative thoughts and fear. It concludes that fear is a demonic transformation of faith.