For from within, out of the heart of man, come evil intentions: fornication, theft, murder, adultery, avarice, wickedness, deceit, licentiousness, envy, slander, pride, folly. All these evil things come from within, and they defile a man.
Have you ever noticed that the Bible contains many lists of things? There are ten commandments, ten plagues of Egypt; then we have the seven days of creation and the seven gifts of the Spirit, corresponding to the seven petitions of the Lord’s prayer and also to the eight beatitudes. The twelve foundations stones of the heavenly Jerusalem are named for the twelve Apostles, who are themselves successors to the twelve patriarchs who fathered the twelve tribes of Israel.