Regarding the activities of such great sages and devotees like Parvat Muni and Parasara Muni begetting children, such activities of these elevated souls are not to be questioned by us. They have a higher purpose which we cannot determine; therefore it is said in the Srimad-Bhagavatam that one should not try to imitate the actions of the Isvaras or those who are very powerful, but one should follow their instructions.
Letter to Ekayani dasi, 25 July, 1970