Kautilya's Arthashastra 1.5.16

1.5.16

śrutādd hi prajñopajāyate prajñāyā yogo yogād ātmavatteti vidyānāṃ sāmarthyam //

For from hearing (sutra) ensues knowledge; from knowledge steady application (yoga) is possible; and from application self-possession (atmavatta) is possible. This is what is meant by efficiency of learning (vidhyasamarthyam).