The Ninth Commandment, like the Sixth Commandment, is against sins of impurity. While the Sixth Commandment explicitly forbids adultery and by extension all impure actions, the Ninth Commandment forbids all impure thoughts.
Photo from her canonization
Example of St. Maria Goretti
The Holy Church annually remembers St. Maria Goretti, who died a martyr at the young age of 12 in 1902. For those of you reading that haven't heard of her, her life is worth reading.
St. Maria Goretti was born on October 16, 1890, in Corinaldo, Italy to Luigi Goretti and Assunta Carlini. She was baptized the next morning. She was raised as a pious farm girl, one of six children, who grew in holiness. In 1896 the family moved to Ferriere di Conca and shortly afterwards, St. Maria's father died of malaria. The Goretti family was forced to move onto the Serenelli farm to survive.
On July 5, 1902, St. Maria Goretti, at the age of 12, was attack by Alessandro Serenelli, a farm hand, who wanted to rape her. He had repeatedly suggested impure things to her previously, but this time hatred filled him. St. Maria Goretti refused sexual relations first and foremost because it was a sin outsid>...