तत्रैकाग्रं मनः कृत्वा यतचित्तेन्द्रियक्रियः । उपविश्यासने युञ्ज्याद्योगमात्मविशुद्धये ॥
tatraikāgraṃ manaḥ kṛtvā yatacittendriyakriyaḥ | upaviśyāsane yuñjyādyogamātmaviśuddhaye ||
Translation
There, seated on that seat, making the mind one-pointed, with the activities of the mind and senses controlled — one should practice yoga for self-purification.
Interpretation
The purpose of meditation is made explicit: atma-vishuddhi — purification of the self. The mind naturally scatters across multiple objects; meditation cultivates ekagrata — one-pointedness, the ability to hold the mind on a single object without wavering. The activities of both the mind (chitta — the thinking substance) and the senses (indriya) are brought under conscious control. This is not suppression but training — like a wild river being channeled into an irrigation canal, the same energy becomes useful and directed.