Kriya-yoga (Action-Union/true Karma-yoga, "soul action") has five items - Talavya, Pranayama, Nabhikriya, Yonimudra and Mahamudra. These five item total the first chapter of Kriya-yoga.
When a devotee can complete the first chapter he is eligible to obtain the second chapter. In total, Kriya-yoga has six chapters. Omkara-kriya features from the second till the sixth chapter. The mystery of Kriya-yoga sadhana can be derived exclusively from the guru.
Through Talavya, the obstruction of the toungue is released; through Pranayama, Prana and Apana airs are stilled; through Nabhikriya, Samana air achieves a state of evenness; through Yonimudra, soul-realization occurs and through Mahamudra, Vyana and Udana airs achieve a state of settlement.
By conquering the five Pranas in this manner, settling in the void essence at Kutastha and by arriving at the state beyond action the Kriyaban is capable of wandering in the realm of his self.
- Shama Churn
“Focused and remaining in the transcendental state of kriya - that state is one of darkness and sleep for all of the phenomenal world, and that state which all people who are looking with attachment and perceiving as the waking state - the “munis" (sages), meaning those who have spontaneously become “mouni” (mute) - who do not have the desire to say anything - they see them (people of worldly perspective) as being in darkness, meaning sleep.”
"If atmakarma is regularly practised, one day you will reach the state beyond all actions, or the source or origin which is the objective and then you will have a communion with the infinite soul and realize yourself."
"This path of sadhana is scripturally regarded as soul-knowledge, spiritual knowledge or brahma-knowledge. (Shama Churn named it Kriyayoga or kriya) This kriyayoga is logical and scientific. The fact that it is entirely scientific is because it is described to be as accurate as mathematics."
"Kriya means action. the karma yoga of the gita is kriyayoga. Karma also infers action. Nothing can be achieved without action, therefore much stress has been laid on karma yoga in the gita. The name of kriyayoga has been mentioned in the Patanjala yoga philosophy and in many other places in the sastras."
"The soul within you is the soul which pervades all elements. Therefore the soul of all the elements exists within you. There is no difference, thus it is you who becomes the all pervasive soul, "Jagannatha (master of the universe)". The moment you specially realize this in kriya's transcendental state, you can realize the mental inclinations of everybody and it is then by achieving omniscience you will automatically learn about the attributes and actions of all elements. Then by being omnipotent all action can be performed with a non-desirable wish.
By this type of profound Kriya, realization of the subtlest of the subtle (molecule like) self occurs, leading to the removal of pride and a pride-less state will be achieved. You are Kutastha, pay reverence to him, it is repeated again - pay reverence to him. Do non desist from paying this reverence because you only are kutastha-like almighty soul and you are beyond the five essences, the mind, intellect and self conceit. When you become one in kriya's transcendental state then you only are the supreme pervading the universe, without you the world does not exist, thus good, evil, and imagination do not exist.
If you attain oneness, you are the imperishable and indestructible one, the tranquil pure consciousness and immortal. Then where are your birth, action, propensity and pride? Therefore by abandoning the divisions of this and the fact that everything is the self, become doubtless positively about this in the transcendental state of kriya. You are perceiving the world because you are not within yourself, but in kriya's transcendental state when you will remain within yourself then you only will become the reality.
Just for once contemplate on the fact that barring you, everything is absent, you are materialistic and non-materialistic because when you concentrate on extraneous matters you are materialistic, again by remaining within yourself or in the transcendental state of kriya, you are non-materialistic. Everything evolves in this universe in accordance with your volition; in kriya's transcendental state after the cessation of desires you will positively know that the universe is a fallacy merely and by obtaining the knowledge that the entire universe is pervaded by brahma you will attain equilibrium. Then you are neither in bondage nor are liberated and being crowned with success in this manner you will wander in beatitude, this is the maxim of kriyayoga."
-Shama Churn