ताभ्यां बहुगुणविशिष्टे लाभे यायात् ॥ कZ_०९.४.०३ ॥
tābhyāṃ bahu-guṇa-viśiṣṭe lābhe yāyāt.
唯有当所求之利相对于二者具有多倍优势时,方可前进(承受这些损失/支出)。
Do not spend men or material unless the expected gain is decisively larger—i.e., a clear surplus after accounting for attrition and resource depletion.