Śrīmad-Bhāgavatam 7.9.35 - Māyāpur, March 13, 1976
But that is not the fact. There are many, many millions and trillions of planets. Everywhere there is life. Even in the sun planet there is life. We see it is fiery. If there is no life, then where is the opportunity of Kṛṣṇa's speaking, imaṁ vivasvate yogaṁ proktavān aham avyayam: [Bg. 4.1] "I spoke first of all this science to Vivasvān"? Vivasvān manave prāha... [break] "First of all I spoke this science to the sun god, the chief person in the sun planet." So we cannot accept the so-called scientists' version that there is no life in the sun planet. Everywhere there is: sun planet, moon planet every... In the moon planet al... [break] ...arhad yad brahmaṇo viduḥ. So many millions of years is equal to twelve hours... [break] Lord Brahmā had to undergo austerity for hundreds of years of his calculation. So not our hundreds of years. Our hundreds of years may be Brahmā's a few hours only. Law of relativity. So Brahmā, even though he is directly born of Viṣṇu, he's not ordinary living be... He's also a living entity like us, but very, very pious.
Just like here somebody is very rich, very influential, very beautiful, very learned. These are the results of pious activities, janmaiśvarya-śruta-śrī [SB 1.8.26]. If you are pious, then you get good opportunity of taking your birth in good family, aristocratic family, brāhmaṇa family, like that. You become beautiful, become educated. So Brahmā is also a similar living entity, but he's very, very pious. Very very pious. And Brahmā... Brahmā's post is so exalted that when there is no living entity available, then Lord Viṣṇu Himself becomes Brahmā. The post is so important. My point is that although he's so pious, greatly exalted, still, he had to purify himself.
Jaya Srila Prabhupada