The spiritual planets are called Vaikuṇṭhas because there is no lamentation or fear there; everything is eternal. The spiritual world has been calculated to comprise three-fourths of the energies of the Supreme Lord, and the material world is said to comprise one-fourth of His energy, but no one can understand what this three-fourths is, since even this material universe, which comprises only one-fourth of His energy, cannot be described. Trying to convey to Sanātana Gosvāmī something of the extent of one-fourth of Kṛṣṇa's energy, Caitanya Mahāprabhu cited an incident from Śrīmad-Bhāgavatam in which Brahmā, the lord of the universe, came to see Kṛṣṇa at Dvārakā. When Brahmā approached Kṛṣṇa, the doorman informed Kṛṣṇa that Brahmā had arrived to see Him. Upon hearing this, Kṛṣṇa inquired as to which Brahmā had come, and the doorman returned to Brahmā and asked, "Which Brahmā are you? Kṛṣṇa has asked."
Brahmā was struck with wonder. Why did Kṛṣṇa ask such a question? He informed the doorman, "Please tell Him that Brahmā, who is the father of the four Kumāras and who has four heads, has come to see Him."
The doorman informed Kṛṣṇa and then asked Brahmā inside. Brahmā offered his obeisances unto the lotus feet of Kṛṣṇa, and after receiving him with all honor, Kṛṣṇa inquired about the purpose of his visit.
"I shall tell You of my purpose in coming here," Lord Brahmā replied, "but first I have a doubt which I ask You to kindly remove. Your doorman told me that You asked which Brahmā has come to see You. May I inquire if there are other Brahmās besides me?"
Upon hearing this, Kṛṣṇa smiled and at once called for many Brahmās from many universes. The four-headed Brahmā then saw many other Brahmās coming to see Kṛṣṇa and to offer their respects. Some of them had ten heads, some had twenty, some had a hundred and some even had a million heads. Indeed, the four-headed Brahmā could not even count the Brahmās who were coming to offer their obeisances to Kṛṣṇa. Kṛṣṇa then called many other demigods from various universes, and they all came to offer their respects to the Lord. Upon seeing this wonderful exhibition, the four-headed Brahmā became nervous and began to think of himself as no more than a mosquito in the midst of many elephants. Since so many demigods were offering obeisances unto the lotus feet of Kṛṣṇa, Brahmā concluded that the unlimited potency of Kṛṣṇa could not be estimated. All the helmets of the various demigods and Brahmās shone brightly in the great assembly, and the prayers of the demigods made a great sound.
"Dear Lord," the demigods said, "it is Your great mercy that You have called us to see You. Is there any particular order? If so, we will carry it out at once."
"There is nothing especially required of you," Lord Kṛṣṇa replied. "I only wanted to see you together at one time. I offer My blessing to you. Don't fear the demons."
"By Your mercy, everything is all right," they all replied. "There are no disturbances at present, for by Your incarnation everything inauspicious is vanquished."
As each of the Brahmās saw Kṛṣṇa, each thought that He was only within his universe. After this incident, Kṛṣṇa wished all the Brahmās farewell, and after offering respects to Him, they returned to their respective universes. Upon seeing this, the four-headed Brahmā at once fell down at the feet of Kṛṣṇa and said, "What I thought about You at first was all nonsensical. Everyone may say that they know You in perfection, but as far as I am concerned, I cannot begin to conceive how great You are. You are beyond my conception and understanding."
"This particular universe is only four thousand million miles broad," Kṛṣṇa then informed him, "but there are many millions and billions of universes which are far, far greater than this one. Some of these are many trillions of miles broad, and all these universes require strong Brahmās, not just four-headed." Kṛṣṇa further informed Brahmā, "This material creation is only a quarter manifestation of My creative potency. Three quarters of My creative potency is in the spiritual kingdom."
After offering obeisances, the four-headed Brahma parted from Kṛṣṇa, and he could understand the meaning of the Lord's "three-quarters energy."
The Lord is therefore known as Tryadhīśvara, a name indicating His principal abodes—Gokula, Mathurā and Dvārakā. These three abodes are full of opulences, and Lord Kṛṣṇa is the master of them all. Situated in His transcendental potency, Lord Kṛṣṇa is master of all transcendental energies, and He is full with six opulences. Because He is master of all opulences, all Vedic literatures acclaim Kṛṣṇa to be the Supreme Personality of Godhead.