1) The document provides steps for making a good confession, including examining one's conscience, feeling perfect sorrow for sins, promising to avoid temptation, confessing sins to a priest, and doing the assigned penance.
2) It explains the difference between imperfect sorrow (being sorry out of fear of punishment) and perfect sorrow (being truly sorry for offending God).
3) The story of the two thieves crucified next to Jesus illustrates that Jesus forgave the thief who had perfect sorrow for his sins. The document encourages feeling perfect sorrow in order to receive forgiveness from God.