अभ्यन्तरकोपो बाह्यकोपात्पापीयानित्युक्तं पुरस्तात् ॥ कZ_०९.३.११ ॥
abhyantara-kopo bāhya-kopāt pāpīyān ity uktaṃ purastāt
Internal hostility is more dangerous than external hostility—so it has been stated earlier.
Regime stability and internal cohesion are the first line of defense; external enemies are less dangerous than internal fracture.