SB 7.11.13

After giving a general list of thirty qualifications for one's behavior, Narada Muni now describes the principles of the four varnas and four asramas. A human being must be trained in the above-mentioned thirty qualities; otherwise, he is not even a human being. Then, among such qualified persons, the varnasrama process should be introduced. In the varnasrama system, the first ceremony for purification is garbhadhana, which is performed with mantras at the time of sex for propagating a good child. One who uses sex life not for sensual pleasures but only to beget children according to the reformatory method is also accepted as a brahmacari. One should not waste semen on sensual pleasure, violating the principles of Vedic life. Restraint in sex is possible, however, only when the populace is trained in the above-mentioned thirty qualities; otherwise, it is not possible. Even if one is born in a family of dvijas, or twiceborn, if they have not followed the reformatory process he is called a dvija-bandhu-not one of the twiceborn, but a friend of the twiceborn. The whole purpose of this system is to create good population. As stated in Bhagavad-gita, when women are polluted the populace is varna-saṅkara, and when the varna-saṅkara population increases, the situation of the entire world becomes hellish. Therefore, all the Vedic literatures strongly warn against creating varna-saṅkara population. When there is varna-saṅkara population, the people cannot be properly controlled for peace and prosperity, regardless of great legislative assemblies, parliaments and similar bodies.