"Then Judith said to him: 'Accept the words of your slave-girl and let your maidservant speak in your presence. I will say nothing false to my lord this night.'" (Judith 11:5)
Judith is brought to Holofernes's tent. She prostrates herself; his servants raise her up. Holofernes says: take courage, woman; be not afraid in your heart; I have never hurt anyone who chose to serve Nebuchadnezzar. Now tell me why you have fled from your people. Then Judith said to him: 'Accept the words of your slave-girl and let your maidservant speak in your presence. I will say nothing false to my lord this night.' She proceeds to speak with great skill, mixing truth and deception: her people have sinned against God by planning to eat the Temple's first fruits and offerings, which the law forbids; God will punish them; she has escaped to tell Holofernes; she will pray to God and he will tell her when they have sinned, then she will lead Holofernes through the hill country without loss. Holofernes and all his servants are won over by her words.
The Catechism's nuanced discussion of the ethics of lying is relevant to Judith's ambiguous speech: the tradition has recognised that in extreme cases of unjust aggression, deception of the aggressor is not simply equivalent to ordinary lying (CCC 2482).
Brothers and sisters, Judith said I will say nothing false to my lord this night, and then proceeded to use every ambiguous word and concealed intention she could. The book presents her not as a model of straightforward honesty but as a model of courage: she risked everything for her people. The courage is the point.
Lord God, give your people the courage to walk into the enemy's tent for the sake of the community, even when the way is dangerous and the words must be carefully chosen. Through Christ our Lord. Amen.