mayavadis & karmi's can't be

Among all the living entities wandering throughout the universe, one who is most fortunate comes in contact with a representative of the Supreme Personality of Godhead and thus gets the opportunity to execute devotional service. Those who are sincerely seeking the favor of Krsna come in contact with a guru, a bona fide representative of Krsna. The Mayavadis indulging in mental speculation and the karmis desiring the results of their actions cannot become gurus. A guru must be a direct representative of Krsna who distributes the instructions of Krsna without any change. Thus only the most fortunate persons come in contact with the guru. As confirmed in the Vedic literatures, tad-vijnanartham sa gurum evabhigacchet: one has to search out a guru to understand the affairs of the spiritual world. Srimad-Bhagavatam also confirms this point. Tasmad gurum prapadyeta jijnasuh sreya uttamam: one who is very interested in understanding the activities in the spiritual world must search out a guru-a bona fide representative of Krsna. From all angles of vision, therefore, the word guru is especially meant for the bona fide representative of Krsna and no one else. Padma Purana states, avaisnavo gurur na syat: one who is not a Vaisnava, or who is not a representative of Krsna, cannot be a guru. Even the most qualified brahmana cannot become a guru if he is not a representative of Krsna. Brahmanas are supposed to acquire six kinds of auspicious qualifications: they become very learned scholars (pathana) and very qualified teachers (pathana); they become expert in worshiping the Lord or the demigods (yajana), and they teach others how to execute this worship (yajana); they qualify themselves as bona fide persons to receive alms from others (pratigraha), and they distribute the wealth in charity (dana). Yet even a brahmana possessing these qualifications cannot become a guru unless he is the representative of Krsna (gurur na syat). Vaisnavah sva-paco guruh: but a Vaisnava, a bona fide representative of the Supreme Personality of Godhead, Visnu, can become a guru, even if he is sva-paca, a member of a family of dog-eaters. Of the three divisions of heavenly planets (svarga-loka), bhauma-svarga is sometimes accepted as the tract of land in Bharata-varsa known as Kashmir. In this region there are certainly good facilities for material sense enjoyment, but this is not the business of a pure transcendentalist. Rupa Gosvami describes the engagement of a pure transcendentalist as follows:    (More...)