तानि सर्वाणि संयम्य युक्त आसीत मत्परः। वशे हि यस्येन्द्रियाणि तस्य प्रज्ञा प्रतिष्ठिता ॥

tāni sarvāṇi sanyamya yukta āsīta mat-paraḥ vaśhe hi yasyendriyāṇi tasya prajñā pratiṣhṭhitā

Having restrained them all, he should sit harmonised, I his supreme goal; for, whose senses are mastered, of him the understanding is well poised.

In plain words: So a person should control all their senses and sit with a calm mind, keeping Krishna as their highest goal. When someone is master of their senses, their mind stays steady.