Śrīmad-Bhāgavatam · Text 11.20.21
Who is speaking and story frame
एष वै परमो योगो मनस: सङ्ग्रह: स्मृत: ।
हृदयज्ञत्वमन्विच्छन् दम्यस्येवार्वतो मुहु: ॥ २१ ॥
eṣa vai paramo yogo
manasaḥ saṅgrahaḥ smṛtaḥ
hṛdaya-jñatvam anvicchan
damyasyevārvato muhuḥ
An expert horseman, desiring to tame a headstrong horse, first lets the horse have his way for a moment and then, pulling the reins, gradually places the horse on the desired path. Similarly, the supreme yoga process is that by which one carefully observes the movements and desires of the mind and gradually brings them under full control.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.