Srimad Bhagvata Mahapurana: Book 3: Chapter 6: Verses 35-40
Who can dare describe in full, O Vidura, the cosmic body of the Lord, who has Time, Karma (destiny) and Swabhava (the innate disposition) of the Jivas for His potencies-the body which reveals the might of the Lord's Yogamaya (divine power)? Yet, inorder to purify my own speech which has been rendered foul by other (profane) talk, I proceed to sing, dear Vidura, the glory of Sri Hari according to my own (poor) lights and on the basis of what I have heard (from my preceptor). The wise declare that the sole utility of men's speech decidedly lies in uttering the praises of the Lord, who is the foremost of those enjoying the highest renown, and that the sole utility of one's ears lies in their coming into touch with the nectar-like discourses on Sri Hari, delivered by learned men. Was it possible, dear child, for Brahma (the first of all seers) to fathom the glory of Sri Hari (the Universal Spirit) even after pondering it for a thousand (celestial) years with his intellect ripened through the practice of Yoga ? Therefore, the Lord's Maya deludes even those skilled in creating illusions. When the Lord Himself does not know the course of His own Maya, how can others fathom it ? Obeisance to the Lord, from whom not only speech and mind but even Rudra (the deity presiding over the ego) and the other gods (those presiding over the senses and the organs of action) return disappointed, unable to reach Him.
Thus ends the sixth discourse in Book Three of the great and glorious Bhagavata-Purana, otherwise known as the Paramahamsa-Samhita.