The method of writing in Puranas is Vedic i.e. classical or social. There is decency, etiquette and discipline in their stories. There are limited words. Anti-social mysteries are also described in them in a social manner. For example, Muladhara is described as a dark deep pit or underworld on earth somewhere or the ocean. The attached thoughts of the wandering mind or the ego are likened to demons or animals. They are shown entering the pit or living there. They are shown killing and harassing all living beings and gods including humans. Then Indra and other gods are shown going to Brahma and he alongwith them to the divine hero for help and pray for that. Then the hero of the story enters that pit and takes out the demons and their overlord. Fights them and by killing them or purifying them grants them the highest position of salvation. In fact, all thoughts merge in God only. This is the spiritual science of Kundalini Yoga. Meaning, God has installed Yogakundalini shakti in the body himself to fight ignorance. The yogi concentrates on the meditation image in the Muladhara chakra area. When that image reaches the brain through the nerves, it also brings with it the suppressed thoughts and emotions of the subconscious mind. Due to this, they get expressed in the mind with the feeling of witnessing and merge into the soul. In reality, Shakti ascends from the base, with the help of meditation image. The same Shakti exposes the emotions buried in the mind. To explain, it is said that the meditative image in the form of Shiva brought out with itself all the suppressed images in the form of demons from the pit in the form of Muladhar and liberated them by killing them. Shakti is sleeping in Muladhar, due to which due to lack of energy in the brain, its Kundalini-like buried or hidden or subconscious or unconscious thoughts are also sleeping. It is explained that those thoughts also sleep in the Mooladhar. When that Shakti starts awakening due to strengthening of Mooladhar, it also starts awakening or expressing the thoughts of the brain. It is explained that the Kundalini Shakti of Muladhar is awakening, that is, the mixture of Shakti and thoughts is awakening. That is why people who live longer are taking special care of their perineum area. I was watching the webseries Live to 100 Years, where one of the secrets of longevity of the people of Okinawa, Japan was to keep their base strong through exercise, physical labor etc. The story is built on the base. God himself just make the Shakti accessible and agreeable and also provide favourable conditions for her waking up. This is according to the statement of Patanjali Yoga that while doing Yoga, one should remain surrendered to God and also worship Him because He helps in making Yoga successful. He has called this Ishwar Pranidhan. There is almost a similar trend in all the stories. Similar stories keep coming in between few verses or pages direct spiritual knowledge with changes in name and form to make all interesting. In Shivpuran, Shiva is shown as the hero who kills those demons, whereas in Vishnupuran, Vishnu is shown. The same non-dual principle is called by the names of different gods, which is the experience of awakening. The body is shown as the universe, and the special organs and senses are shown as ordinary gods. People or body cells or simple organs are shown as common people or public. These are all interconnected.
For example, there is a story in Devibhagwat purana that a demon named Mahishasur was in the shape of a buffalo. Sometimes he would take the form of a handsome young man and sometimes he would become a buffalo because he was an impersonator. The common ignorant man is also such an impersonator. Sometimes he creates a beautiful appearance with the external garb and glitter of the attached thoughts of the mind, and sometimes it comes in its true and hidden form, which is in the form of darkness and ego. Sometimes he is shown fused, half buffalo and half man. This is like when there is depression inside a person. At that time, dark and blurry pictures are being formed in his mind. Or there is that condition of man in which he cleverly faces his dark state and tries to get illuminated with good thoughts. That demon used to torture humans and gods, killing them and causing pain to them. Everyone dies due to ignorance. Ignorance is also the cause of sorrow. He had driven away the gods from heaven and took charge of the governance of all the worlds. In reality, the gods are the representatives of the Supreme Soul, hence, they ensure the material progress of man and take him towards him i.e. towards salvation. Not only do they control the physical world, they also stay in the body and keep the body under control. But when man comes under the control of ego born out of ignorance, then he behaves arbitrarily, due to which even his material progress becomes cosmetic and ultimately painful, and he moves away from God. Heaven is the brain in which Sahasrara and Ajna Chakra are the main places. The brain itself is a world as luminous as heaven. In a knowledgeable person, god means the luminous non-dual feeling and by keeping him under his control, he makes the man’s body and mind perform auspicious deeds. But in an ignorant person, this demon i.e. darkness or duality in the form of ego takes control of the body and mind and makes one perform inauspicious deeds. Gods are still doing all the work of the body, but they do their work secretly in other worlds, away from heaven. In a way they become slaves of demons. It is like the workers in a state do all the work, whether the king is of their choice or of their dislike. If it is of their choice, they get proper respect and facilities, and get proper position or representation in the palace, if it is of their dislike, they remain like slaves. The king of the body is the soul, which resides in the brain. Through satsang or spiritual company it remains under the influence of gods, and through bad company it remains under the influence of demons. As he associates, so does he become. That Mahishasura expressed his desire to marry the goddess. The goddess played with him a lot. In the end she fought with him and killed him. He became free by merging with the goddess. An ignorant common man also wants and tries to do the same. When he is in the darkness of spiritual ignorance, his Kundalini Shakti is in Mooladhara. She wants to get up from there. For that he wishes for love and marriage with the woman. A woman like Devi does not accept his proposal at all. She makes him dance a lot behind her. Due to this, the charming image of that woman gets settled in the man’s mind in the form of a continuous trance. Gradually, all his actions and thoughts are burnt to ashes by that samadhi picture, and he also becomes awakened by his continuous natural meditation. After awakening him, the goddess also leaves him. The man has died in a way, because due to transformation his previous world comes to an end. Because Goddess has the biggest contribution in this awakening and transformation, so it was believed that he was killed by the goddess. Actually it seems like that too. That goddess seems to be both an enemy and a friend. An enemy because she destroyed a man’s world or killed him and a friend because she awakened him or liberated him by merging him with herself. That is why most of the demons, despite being enmity with the god all their life, praise and thank him while dying at his hands. Instead of goddess, there can be a god too in male form. This is the general style and principle of the stories of the Puranas, which applies to most of the mystical stories. It also seems that in other Puranas these have been kept more secret than Shivpuran. In most of the stories of Shivpuran, there are some key words or key sentences which help in solving the story. The reason for this seems to be that Shivpuran is mainly written for people engrossed in ecstasy and worldly illusion, whose intelligence is not very subtle, and who do not find the revelation of such stories odd or strange. Although this is a common principle of common household life, it is rarely experienced before awakening. We can also call this natural Kundalini Yoga. It is said in the scriptures that the one who is killed by an incarnation of God becomes free by merging with him. Probably this principle is at the core of this story also.