6.42 Or he is born in the family of wise yogis [Persons possessing knowledge of Brahman. (S. concedes that some rare householders also can have this knowledge, and he cites the instances of Vasistha, Agastya, Janaka and Asvapati of olden days, and Vacaspati and the author of Khanada of recent times.)] only. Such a birth as is of this kind is surely more difficult to get in the world.