means of putting an end to the "grave damage" have been ineffective. The ultimate aim is peace and there is a serious chance of success. No graver evils are produced that overshadow the evil to be eliminated. This forbids the use of arms to eliminate whole cities and areas with their inhabitants. Respect and care is required for non-combatants, wounded soldiers and prisoners. Soldiers are required to disobey commands to commit genocide and ones that violate universal principles. Scandal The Catechism classifies scandal under the fifth commandment and defines it as "an attitude or behavior which leads another to do evil". In the Gospel of Matthew, Jesus stated, "Whoever causes one of these little ones who believe in me to sin, it would be better for him to have a great millstone fastened round his neck and to be drowned in the depth of the sea." The Church considers it a serious crime to cause another's faith, hope and love to be weakened, especially if it is done to young people and the perpetrator is a person of authority such as a parent, teacher or priest. Sixth commandment According to the Church, humans are sexual beings whose sexual identity should be accepted in the unity of body and soul. The sexes are meant by divine design to be different and complementary, each having equal dignity and made in the image of God. Sexual acts are sacred within the context of the marital relationship that reflects a "complete and lifelong mutual gift of a man and a woman." Sexual sins thus violate not just the body but the person's whole being. In his 1995 book Crossing the Threshold of Hope, John Paul II reflected on this concept: After all, young people are always searching for the beauty in love. They want their love to be beautiful. If they give in to weakness, following the models of behavior that can rightly be considered a 'scandal in the contemporary world' (and these are, unfortunately, widely diffused models), in the depths of their hearts they still desire a beautiful and pure love. This is as true of boys as it is of girls. Ultimately, they know that only God can give them this love. As a result, they are willing to follow Christ, without caring about the sacrifices this may entail. Like Orthodox Judaism and Islam, the Catholic Church considers all sexual acts outside