Ourobouros & KuNDalini

Ourobouros. शिव संहिता Shiva samhitA ४-७९

संवेष्ट्य सकलनाडी: सार्धत्रिकुटिलाकृति: ।

मुखे निवेश्य सा पुच्छं सुषुम्णाविवरे स्थिता ॥

Encircling all the nADIs, coiled three and a half times, having inserted her tail in her mouth, She is situated at the mouth of the suShumNA.

From Wikipedia:

The ouroboros or uroboros (/jʊərɵˈbɒrəs/; /ɔːˈrɒbɔrəs/, from the Greek οὐροβόρος ὄφις tail-devouring snake) is an ancient symbol depicting a serpent or dragon eating its own tail.

Shiva statues often have an Ouroboros surrounded by them in the form of a snake eating his tail.

Import: The Ourobouros is nothing but KuNDalini.

The जीव is a fool as long as he eats his own tail. Man's experience of the world as different is the same as eating one's own tail. When कुण्डलिनि KuNDalini is awakened through Yoga practice, and is conveyed to the सहस्रार चक्र sahasrAra cakra, there She unites with शिव Shiva, then all this is realized. Therefore, it makes sense that शिव Shiva statues are depicted as Him transcending the coiled कुण्डलिनि KuNDalini.