"O my Lord, O Supreme Personality of Godhead, You are the maintainer of the whole universe. Everyone is sustained by Your mercy. Therefore devotional service unto You is the true religion of life. I am engaged in such devotional service, and so I request You to please maintain me and ever-increasingly engage me in Your transcendental service. You are the eternal form of sac-cid-ānanda, and Your effulgence is spread all over the creation, just like the sunshine. As the sun disc is covered by the glaring sunshine, so Your transcendental form is covered by the brahmajyoti. I desire to find You within that brahmajyoti. Therefore please remove this glaring effulgence."
In this verse it is clearly stated that the eternal, blissful, cognizant form of the Supreme Lord is to be found within the glaring effulgence of the brahmajyoti, which emanates from the body of the Supreme Lord. Thus the personal body of the Lord is the source of the brahmajyoti, as confirmed in the Bhagavad-gītā (14.27). That the impersonal Brahman is dependent on the Supreme Personality is also stated in the Hayaśīrṣa-pañcarātra. In every other Vedic scripture, such as the Upaniṣads, whenever there is talk of the impersonal Brahman in the beginning, the Supreme Personality is finally established at the end. The Īśopaniṣad mantra we cited above indicates that the Supreme Absolute Truth is both impersonal and personal eternally, but that His personal aspect is more important than the impersonal one.