 In the Sermon on the Mount , Jesus recalls the commandment , " You shall not kill " and then adds to it the proscriptions against anger , hatred and vengeance . Going further , Christ asks his disciples to love their enemies . The Catechism asserts that " it is legitimate to insist on respect for one 's own right to life . " Kreeft says , " self @-@ defense is legitimate for the same reason suicide is not : because one 's own life is a gift from God , a treasure we are responsible for preserving and defending . " The Catechism teaches that " someone who defends his life is not guilty of murder even if he is forced to deal his aggressor a lethal blow . " Legitimate defense can be not only a right but a grave duty for one who is responsible for the lives of others . The defense of the common good requires that an unjust aggressor be rendered unable to cause harm . For this reason , those who legitimately hold authority also have the right to use arms to repel aggressors against the civil community entrusted to their responsibility . 
 In the Sermon on the Mount , Jesus <a href='uninflect' title='1'><mark>recalls</mark></a> the commandment , " You shall not kill " and then <a href='uninflect' title='2'><mark>adds</mark></a> to it the proscriptions against anger , hatred and vengeance . Going further , Christ <a href='uninflect' title='3'><mark>asks</mark></a> his disciples to love their enemies . The Catechism <a href='uninflect' title='4'><mark>asserts</mark></a> that " it is legitimate to insist on respect for one <a href='null_genetive' title='5'><mark>'s</mark></a>own right to life . " Kreeft <a href='uninflect' title='6'><mark>says</mark></a> , " self @-@ defense is legitimate for the same reason suicide <a href='negative_concord' title='7'><mark>is</mark></a> <a href='negative_concord' title='8'><mark>not</mark></a>: because one <a href='null_genetive' title='9'><mark>'s</mark></a>own life <a href='drop_aux' title='10'><mark>is</mark></a>a gift from God , a treasure we <a href='drop_aux' title='11'><mark>are</mark></a>responsible for preserving and defending . " The Catechism <a href='uninflect' title='12'><mark>teaches</mark></a> that " someone <a href='null_relcl' title='13'><mark>who</mark></a><a href='uninflect' title='14'><mark>defends</mark></a> his life <a href='negative_concord' title='15'><mark>is</mark></a> <a href='negative_concord' title='16'><mark>not</mark></a>guilty of murder even if he is forced to deal his aggressor a lethal blow . " Legitimate defense can be not only a right but a grave duty for one <a href='null_relcl' title='17'><mark>who</mark></a><a href='drop_aux' title='18'><mark>is</mark></a>responsible for the lives of others . The defense of the common good <a href='uninflect' title='19'><mark>requires</mark></a> that an unjust aggressor be rendered unable to cause harm . For this reason , those <a href='null_relcl' title='20'><mark>who</mark></a>legitimately hold authority also <a href='got' title='21'><mark>have</mark></a> the right to use arms to repel aggressors against the civil community entrusted to their responsibility . 
In the Sermon on the Mount , Jesus recall the commandment , " You shall not kill " and then add to it the proscriptions against anger , hatred and vengeance . goin further , Christ ask his disciples to love their enemies . The Catechism assert dat " it is legitimate to insist on respect for one  own right to life . " Kreeft say , " self @-@ defense is legitimate for the same reason suicide ain't : because one  own life a gift from God , a treasure we responsible for preserving and defending . " da Catechism teach tdat" some1 defend his life ain't guilty of murder even if he is forced to deal his aggressor a lethal blow . " Legitimate defense can be not only a right but a grave duty for one responsible for tdalives of others . The defense of the common good require that an unjust aggressor b rendered unable to cause harm . For dis reason , those legitimately hold authority also got the right to use arms to repel aggressors against the civil community entrusted to their responsibility .