p. 294
स्तमितज्ञानात्मनावस्थिते पूर्णानन्दे ब्रह्मणि वहन्त्यश्वाः इन्द्रियाणि ।एतदुक्तं भवति—यद्यपीन्द्रियाणि स्वभावतो विषयेष्वेव वर्तन्ते, तथापि विज्ञानसारथिना समाकृष्यमाणानि केतुमन्तं पुरुषं दिव्येव वहन्ति, न पराग्विषय इति ।तदुक्तं कठवल्लीषु—‘आत्मानं रथिनं विद्धि शरीरं रथमेव तु ।बुद्धिं तु सारथिं विद्धि मनः प्रग्रहमेव च ॥इन्द्रियाणि हयानाहुर्विषयांस्तेषु गोचरान् ।आत्मेन्द्रियमनोयुक्तं भोक्तेत्याहुर्मनीषिणः’ इत्यादिना ।यत्र परमात्मनि वहन्ति तपसा, तं भगवन्तं योगिन एव पश्यन्ति ॥
In plain words
...rest in the blissful absolute of Brahman, where the senses serve as horses. The meaning is this: though the senses naturally run outward toward worldly objects, when reined in by the charioteer of discrimination, they carry the radiant spirit toward the spiritual heights rather than toward external distractions. As the Kaṭha Upaniṣad declares: 'Know the Atman as the master of the chariot, the body as the chariot itself, the intellect as the charioteer, and the mind as the reins. The senses are the horses, and objects are their paths. The wise call the enjoyer the one united with the body, senses, and mind.' Where yogis attain that supreme Self through deep austerity, they and they alone perceive that blessed Lord.
Close to the Sanskrit
...in the absolute fullness of joy Brahman the senses carry. This is spoken: although the senses naturally function only in objects, nevertheless being drawn together by the charioteer of wisdom they carry the radiant person toward heaven indeed, not outward to objects. As it is said in the Kaṭha Upaniṣads: 'Know the self as the rider, the body as the chariot indeed; know the intellect as the charioteer, and the mind as the reins indeed. The senses they call horses, the objects their pastures; the enjoyer, united with self, senses, and mind, wise men call him' and so forth. Where in the supreme Self they carry by austerity, that blessed Lord the yogis alone perceive.