Prabhupāda: Read the purport.
Pradyumna: Purport: "Kardama Muni expressed his desire for a very beautiful wife to Emperor Svāyambhuva, and he accepted his daughter for marriage. He was in the hermitage practicing complete celibacy as a brahmacārī, and although he had the desire to marry, he did not want to be a householder for the whole span of his life because he was conversant with the Vedic principles of human life. According to Vedic principles, the first part of life should be utilized in brahmācārya for the development of character and spiritual qualities. In the next part of life, one may accept a wife and beget children, but one should not beget children like cats and dogs.
"Kardama Muni desired to beget a child who would be a ray of the Supreme Personality of Godhead. One should beget a child who can perform the duties of Viṣṇu; otherwise there is no need to produce children. There are two kinds of children born of good fathers: one is educated in Kṛṣṇa consciousness so that he can be delivered from the clutches of māyā in that very life, and the other is a ray of the Supreme Personality of Godhead and teaches the world the ultimate goal of life. As will be described in later chapters, Kardama Muni begot such a child—Kapila, the incarnation of the Personality of Godhead, who enunciated the philosophy of Sāṅkhya. Great householders pray to God to send His representative so that there may be an auspicious movement in human society. This is one reason to beget a child. Another reason is that a highly enlightened parent can train a child in Kṛṣṇa consciousness so that the child will not have to come back again to this miserable world. Parents should see to it that the child born of them does not enter the womb of a mother again. Unless one can train a child for liberation in that life, there is no need to marry or produce children. (Prabhupāda coughing heavily throughout) If human society produces children like cats and dogs for the disturbance of social order, then the world becomes hellish, as it has in this age of Kali. In this age, neither parents nor their children are trained. Both are animalistic and simply eat, sleep, mate, defend and gratify their senses. This disorder in social life cannot bring peace to human society. Kardama Muni explains beforehand that he would not associate with the girl Devahūti for the whole duration of his life. He would simply associate with her until she had a child. In other words, sex life should be utilized only to produce a nice child, not for any other purpose. Human life is especially meant for complete devotion to the service of the Lord. That is the philosophy of Lord Caitanya.