दुर्गाभावे च कोशः परेषाम् ॥ कZ_०८.१.३९ ॥
durgābhāve ca kośaḥ pareṣām
ଦୁର୍ଗ ନଥିଲେ କୋଷାଗାର ଅନ୍ୟମାନଙ୍କ (ଶତ୍ରୁମାନଙ୍କ) ହାତକୁ ଯାଏ।
They show a trade-off: treasury is portable (enabling retreat), yet also needs fortified protection; forts secure wealth, but wealth enables mobility and continued resistance.