सर्वेषां कर्मणा वीर्यं जवस्तेजश्च वर्धते ॥ कZ_०२.२.१६च्द् ॥
sarveṣāṃ karmaṇā vīryaṃ javas tejaś ca vardhate
For all of them, through sustained work/training their strength, speed, and fighting vigor increase.
Quality is not only innate or regional; systematic training and workload management can upgrade performance, justifying investment in disciplined institutions (stables, trainers, routines).