Tradition established, under directions of the holy Babaji, is that Kriya has to be obtained directly from a Kriya Yoga Guru and to be handed down from the Guru to the initiate in a continuous chain. A Kriya Yogi can only act as a Kriya-Guru when allowed to do so under permission from his own Guru. Disciples of Lahiri Mahasaya used to be told to keep the teachings a closed secret and not to talk about it even with friends and relations who were not initiated into the secrets. So religiously this direction was followed that in cases even Kriya performers living as neighbours over twenty years did not know each other as members of the same spiritual fraternity
One who gives the teaching without having received permission to teach the Kriya of Brahman, he does not receive - meaning: the one to whom he gives the teaching does not get any results, and the one who gives it steals from Brahman, and his every step is in hell - meaning suffering comes upon him.
"The learned master, initiates the disciple as per his qualities and his capabilities. If the disciple follows the instructions truly and dutifully, he attains perfection by it. A desireless condition is availed by perfection----which is possible in the Paravastha of Kriya. There are different kinds of Kriya acts, the able master does not teach them all at a time, only the ones who get well versed in the previous acts are passed on to the next class of acts.If after the first initiation the tongue is not risen or elevated (above the palate) then the second class or "Vaisya" class is not promoted to, and further lessons are not taught. Yet, if whatever is known or learnt is dutifully practiced with a concentrated mind and pran, then the paravastha which is the fruit of such acts will surely be gained."
But according to the physical and psychological states and makeup [constitution] of individuals, He gave instructions for practice of the performance of different stages of Kriyayoga sadhana - First, Second, Third etc. - and their methods and techniques.
We were privileged, in Puri, to be able to visit Sri Bhupen Sanyal Mahasaya, a direct disciple of Lahiri Mahasaya, and to meditate in his presence every evening. I was told on a number of occasions that Lahiri Mahasaya used to bestow the higher Kriya initiations according to what the people themselves actually needed-that is to say, according to what would truly be effective for them, and not just for the sake of "getting more," greedily. Some of his disciples never received more than one initiation, even though they were with him for many years. Lahiri Mahasaya would say to them, "One is enough for you."
There may be quite a good number of Kriya performers who have been taught the Second Kriya; the number doing the Third is very low. The cases of performers of the Fourth Kriya is extremely rare, hardly a few. Swami Shri Yukteshvar had given the Fourth Kriya to only one disciple, and the latter had taught one or two more. Similar is the case with the other celebrated disciples of Shri Shri Lahiri Mahasaya.
It was proposed that in order to excel in the ordained work of sadhus, three ashrams should be established to accommodate the different ages and levels of the sadhakas from Sadhu Sabha. Those who were in the first stages of sadhana, meaning beginners who would live as celibates [Brahmacharis], they were to be in Puri’s Kararashram. The students would stay there up to about the age of twenty-five. For those that wanted to continue after finishing here onto the second level, or would accept the ways of a sadhaka, a house was rented in Benares and founded as “Pranabashram.” It was decided that here there would be a proper printing press, as well as an environment for interactive gatherings and facilitation of advanced instruction, education and practice of the spiritual path. At this time, meaning the second stage of the sadhaka’s life, the sadhakas, living as sadhakas, would serve the public according to the fellowship‘s rules, for the benefit of body, mind and soul. For this work in Benares, he received the company and help of his Guru-brother-disciple, the disciple of Sri Sri His Holiness Yogiraj and author of the “Pranab Gita”, the eminent Swami Pranabananda Giri Maharaj. For those who were advanced on the path of sadhana and attained some permanence in it, meaning the initial stages of being a siddha, and when usually one would have passed the age of fifty, a “siddha” ashram was proposed to be founded in Hrishikesh by the seven rivers in the Himalayan foothills, the land of meditation, for living the ideal of a self-surrendered spiritual life filled with the Paramatman-substance. But it was also instructed that the sadhakas of all stages would be attentive to education and service with the ideal of purity of consciousness. The aim of work for the fellowships carrying the identity, or the branches of and with the Satsanga Sabha, became: to provide proper....
Enlightened and accomplished disciples and grand disciples who had been duly authorized for the purpose spread the message and teachings of Kriya Yoga all over the country and abroad in later years. It may, however, be mentioned that minor differences are noticed in the system now being taught by different groups although the basic features still remain intact.