यत्र बाह्या अभ्यन्तरानुपजपन्ति अभ्यन्तरा वा बाह्यान्तत्रोभययोगे प्रतिजपतः सिद्धिर्विशेषवती ॥ कZ_०९.५.०४ ॥
yatra bāhyā abhyantarān upajapanti abhyantarā vā bāhyān tatra ubhaya-yoge pratijapataḥ siddhir viśeṣavatī.
Where external agents subvert internal elements—or internal agents subvert external ones—there, when both (internal and external) counter-intrigues are employed together, success in countering is especially assured.
Cross-domain threats require cross-domain response: domestic security and foreign operations must be synchronized to break the linkage between internal collaborators and external sponsors.