Our high calling and dignity as sons and daughters of God (Genesis 2, lesson B08) has been wounded by sin (Genesis 3, lesson A09). Review of original sin and its consequences. Concupiscence and how it leads to sin. The nature of sin and its effects. Mortal and venial sin. Sin and culpability. Temptation, sin, and conscience. Contrition, repentance, penance, and forgiveness.