इति पीडनानि आभ्यन्तरो मुख्यस्तम्भो बाह्योऽमित्राटवीस्तम्भः । इति स्तम्भवर्गह् ॥ कZ_०८.४.४८ ॥
iti pīḍanāni ābhyantaro mukhyastambho bāhyo 'mitrāṭavīstambhaḥ | iti stambhavargaḥ.
Thus are the forms of oppression/pressure: the internal pillar is the principal (core) pillar; the external pillar is the enemy-and-forest pillar. This is the ‘pillar’ classification.
Internal stability and administration are the primary support of state power; external threats are secondary if the internal base is sound.