In the beautiful book by Gorakhnath, Die O Yogi Die, he speaks of the inner star-spangled sky of the crown chakra
One of the practices to achieve this could be following the below 3 steps which I will name as the Sahasrara Anubhava Kriya or the Actions to experience the Sahasrara
1. The practice of many Surya Namaskars. This ensures that the spinal cavity is well rinsed by the spinal fluid, the way a pipe is rinsed with the water it contains. This helps in the free flow of Prana all along the spine and also cleanses the various nadis very well.
2. The practice of Shirashasana for around 5 minutes
3. Finally doing a 108 or more Kapala Bhatis (Active breathing out and Passive breathing in) in Siddhasana (Sitting with the left heel pressing the perineum and the right heel pressing against the pubic bone) and in the last round, retaining the out-breath (refraining from taking the in-breath) and simultaneously engaging the bandhas of pressing the heels into the perineum and the pubis (This is what Siddhasana is, and can also be seen as employing the Moola Bandha), pulling in the navel (Uddiyana Bandha) and if possible employing the Jalandhara Bandha by pressing the chin into the chest (Though this is not needed to be done consciously as the head automatically bends forward once you reach the level explained so far). Doing this results in the experience of the Prana shooting up hard and fast into the cranium where it encounters the star-spangled inner sky. This is an experience that is amazingly beautiful.
Now what does this have to do with the story of Ganga?
The reason why Ganga is said to be a cleanser of sins is because of the massive amount of Prana that she contains. Gurudev always says that Pranayama is the greatest of Prayashchittas because it enables the Chitta to go back to its state of innocence. Free from the deep impressions of guilt and pain that conducting a bad deed would have caused on the mind. Prana is that energy whose movements result in thoughts being generated. Different Pranic flow patterns result in commensurate thought patterns being generated. The reason why pranic stability is essential for a zero mind state to be achieved.
The Pranic energy that is raised to the level of the Sahasrara by engaging in the Sahasrara Anubhava Kriya explained above, results also in the subsequent fall of that prana back into the body. As she moves back, the mind starts getting flooded with thoughts. This may sound very perplexing and confusing. Should not the Pranic presence in the Sahasrara be the cause for the experience of Great Bliss? Yes it does, for the few moments of its existence in that region, but once the Bandhas explained in point 3 above, are released, the Prana flows back into the body in a flood. This flood of prana generates a consequent flood of thoughts.
When Ganga fell from the heavens. it is said she caused great destruction. She flooded the ashram of Sage Jahnu and in his anger, it is said he swallowed her up. With Bhagiratha's persistence and prayers, she was released through his ears and hence one of her names being Jahnavi.
The initial force of Ganga was controlled by Lord Shiva Himself, and here the initial force of the downward flowing Prana needs to be controlled using the Shiva of Awareness that lies in each of us. Once the initial downpouring is controlled, it is very essential that the PranaGanga is channeled well to be the life-giving force that we see her today as, rather than the destructive force that she initially proved to be. So once the awareness controls the initial force of the Prana from the Sahasrara, upon the performance of the Sahasrara Anubhava Kriya, the same should be further employed to shine upon good and helpful sankalpas. Sankalpas made in this torrential downpour of Prana come to fruition.
Do create the Ganga of Pranashakti in you everyday and use her potential energy to irrigate the fields of good Sankapla and reap the rich crop
AUM AUM AUM
