This is a lesson about the relationship between thoughts and desires and the Ten Commandments, particularly emphasizing the importance of purity of heart in faith. The lesson explores how original sin can lead individuals to place their hearts on worldly things like power, pleasure, and possessions, rather than on God. It explains the concept of "triple concupiscence" and how virtues and gifts of the Holy Spirit can counteract the effects of these temptations. The lesson also discusses the significance of "poverty of spirit," which involves detaching oneself from worldly riches and seeking God's kingdom above all else. Finally, it addresses the dangers of internal sins and outlines three types: deliberate pleasure, sinful joy, and evil desire.
