इति श्वेताश्वतरोपनिषन्मन्त्रवर्णात् हरौ गुरौ च परा भक्तिः कार्येति ॥
In plain words
So it stands, on the strength of the Śvetāśvatara Upaniṣad's own words: the highest devotion is to be given to Hari and to the teacher alike.
Close to the Sanskrit
Thus — from the very wording of the mantra of the Śvetāśvatara Upaniṣad — toward Hari and toward the guru supreme devotion is to be practised: thus.