In the Padma Purana, the characteristics of the guru, the bona fide spiritual master, have been described:

The guru must be situated on the topmost platform of devotional service. There are three classes of devotees, and the guru must be accepted from the topmost class. The first-class devotee is the spiritual master for all kinds of people. It is said: gurur nrnam. The word nrnam means "of all human beings." The guru is not limited to a particular group. It is stated in the Upadesamrta of Rupa Gosvami that a guru is a gosvami, a controller of the senses and the mind. Such a guru can accept disciples from all over the world. Prthivim sa sisyat. This is the test of the guru.

"Although one may be born in a sudra family, if he is endowed with the brahminical qualities beginning with sama [control of the mind], he is to be accepted as a brahmana. Although one may be born in a brahmana family, if he is endowed with the qualities beginning with kama [lust], he is to be considered a sudra." No one should present himself as a brahmana simply on the basis of being born in a brahminical family. One must be qualified by the brahminical qualities mentioned in the sastras, particularly Bhagavad-gita:

"Peacefulness, self-control, austerity, purity, tolerance, honesty, wisdom, knowledge and religiousness-these are the qualities by which the brahmanas work." (Bg. 18.42)

The disciple must have the following qualifications. He must give up interest in the material bodily conception. He must give up material lust, anger, greed, illusion, madness and envy. He should be interested only in understanding the science of God, and he should be ready to consider all points in this matter. He should no longer think, "I am this body," or, "This thing belongs to me." One must love the spiritual master with unflinching faith, and one must be very steady and fixed. The bona fide disciple should be inquisitive to understand transcendental subject matter. He must not search out faults among good qualities, and he should no longer be interested in material topics. His only interest should be Krsna, the Supreme Personality of Godhead.

"One who is inquisitive to understand the highest goal and benefit of life must approach a bona fide spiritual master and surrender unto him." A serious disciple must be alert when selecting a bona fide spiritual master. He must be sure that the spiritual master can deliver all the transcendental necessities. The spiritual master must observe how inquisitive the disciple is and how eager he is to understand the transcendental subject matter. The spiritual master should study the disciple's inquisitiveness for no less than six months or a year. A spiritual master should not be very anxious to accept a disciple because of his material opulences. Sometimes a big businessman or landlord may approach a spiritual master for initiation. Those who are materially interested are called visayis (karmis), which indicates that they are very fond of sense gratification. Such visayis sometimes approach a famous guru and ask to become a disciple just as a matter of fashion. Sometimes visayis pose as disciples of a reputed spiritual master just to cover their activities and advertise themselves as advanced in spiritual knowledge. In other words, they want to attain material success. A spiritual master must be very careful in this regard. Such business is going on all over the world. The spiritual master does not accept a materially opulent disciple just to advertise the fact that he has such a big disciple. He knows that by associating with such visayi disciples, he may fall down. One who accepts a visayi disciple is not a bona fide spiritual master. Even if he is, his position may be damaged due to association with an unscrupulous visayi. If a so-called spiritual master accepts a disciple for his personal benefit or for material gain, the relationship between the spiritual master and the disciple turns into a material affair, and the spiritual master becomes like a smarta-guru. There are many caste gosvamis who professionally create some disciples who do not care for them or their instructions. Such spiritual masters are satisfied simply to get some material benefits from their disciples. Such a relationship is condemned by Srila Bhaktisiddhanta Sarasvati Thakura, who calls such spiritual masters and disciples a society of cheaters and cheated. They are also called baulas or prakrta-sahajiyas. Their aim is to make the connection between the spiritual master and the disciple into a very cheap thing. They are not serious in wanting to understand spiritual life.

"Those whose minds are distorted by material desires surrender unto demigods and follow the particular rules and regulations of worship according to their own natures." (Bg. 7.20)

"A person who worships the demigods and gives up Lord Vasudeva is like a man who gives up the protection of his mother for the shelter of a witch."

"Whatever a man may sacrifice to other gods, O son of Kunti, is really meant for Me alone, but it is offered without true understanding."

"Men of small intelligence worship the demigods, and their fruits are limited and temporary. Those who worship the demigods go to the planets of the demigods, but My devotees ultimately reach My supreme planet." (Bg. 7.23)

"Whoever thinks Lord Visnu and the demigods are on the same level is to be immediately considered a rogue as far as spiritual understanding is concerned."

"One who engages in full devotional service, who does not fall down in any circumstances at once transcends the modes of material nature and thus comes to the level of Brahman." When one engages in the Supreme Lord's devotional service, he is in a transcendental position. Even though one may be situated in the mode of goodness in the material world, he is susceptible to pollution by the modes of passion and ignorance. When the mode of goodness is mixed with the mode of passion, one worships the sun-god, Vivasvan. When the mode of goodness is mixed with the mode of ignorance, he worships Ganapati, or Ganesa. When the mode of passion is mixed with the mode of ignorance, one worships Durga, or Kali, the external potency. When one is simply in the mode of ignorance, he becomes a devotee of Lord Siva because Lord Siva is the predominating deity of the mode of ignorance within this material world. However, when one is completely free from the influence of all the modes of material nature, he becomes a pure Vaisnava on the devotional platform. Srila Rupa Gosvami states in the Bhakti-rasamrta-sindhu:

The position of visuddha-sattva is the position of uncontaminated goodness. On that platform, one can then understand, aradhyo bhagavan vrajesa-tanayas tad-dhama vrndavanam: "The Supreme Personality of Godhead, the son of Nanda Maharaja, is to be worshiped along with His transcendental abode, Vrndavana."