The Ten Mahavidyas are known as Wisdom Goddesses. The spectrum of these ten goddesses covers the whole range of feminine divinity, encompassing horrific goddess's at one end, to the ravishingly beautiful at the other. Mahavidya means (Maha - great; vidya - knowledge) Goddesses of great knowledge. These Goddesses are:
Kali the Eternal Night
Tara the Compassionate Goddess
Shodashi the Goddess who is Sixteen Years Old
Bhuvaneshvari the Creator of the World
Chinnamasta the Goddess who cuts off her Own Head
Bhairavi the Goddess of Decay
Dhumawati the Goddess who widows Herself
Bagalamukhi the Goddess who seizes the Tongue
Matangi the Goddess who Loves Pollution
Kamala the Last but Not the Least

Once during their numerous love games, things got out of hand between Shiva and Parvati. What had started in jest turned into a serious matter with an incensed Shiva threatening to walk out on Parvati. No amount of coaxing or cajoling by Parvati could reverse matters. Left with no choice, Parvati multiplied herself into ten different forms for each of the ten directions. Thus however hard Shiva might try to escape from his beloved Parvati, he would find her standing as a guardian, guarding all escape routes.

Each of the Devi's manifested forms made Shiva realize essential truths, made him aware of the eternal nature of their mutual love and most significantly established for always in the cannons of Indian thought the Goddess's superiority over her male counterpart. Not that Shiva in any way felt belittled by this awareness, only spiritually awakened. This is true as much for this Great Lord as for us ordinary mortals. Befittingly thus they are referred to as the Great Goddess's of Wisdom, known in Sanskrit as the Mahavidyas. Indeed in the process of spiritual learning the Goddess is the muse who guides and inspires us. She is the high priestess who unfolds the inner truths.

Kali - the Eternal Night
Kali is mentioned as the first amongst the Mahavidyas. Black as the night (ratri) she has a terrible and horrific appearance. The word 'ratri' means "to give," and is taken to mean "the giver" of bliss, of peace of happiness. Read Kali Mantra

Tara - the Compassionate Goddess
Literally the word 'tara' means a star. Thus Tara is said to be the star of our aspiration, the muse who guides us along the creative path. Read Tara Mantra

Shodashi - the Goddess who is Sixteen Years Old
The word 'Shodashi' literally means sixteen in Sanskrit. She is thus visualized as sweet girl of sixteen. In human life sixteen years represent the age of accomplished perfection after which decline sets in. This girl of sixteen rules over all that is perfect, complete, beautiful. Read Shodashi Mantra

Bhuvaneshvari - the Creator of the World
The beauty and attractiveness of Bhuvaneshwari may be understood as an affirmation of the physical world, the rhythms of creation, maintenance and destruction, even the hankerings and sufferings of the human condition is nothing but Bhuvaneshvari's play, her exhilarating, joyous sport. Read Bhuvaneshwari Mantra

Chinnamasta - the Goddess who cuts off her Own Head
The image of Chinnamasta is a composite one, conveying reality as an amalgamation of sex, death, creation, destruction and regeneration. It is stunning representation of the fact that life, sex, and death are an intrinsic part of the grand unified scheme that makes up the manifested universe. Read Chinnmasta Mantra

Bhairavi - the Goddess of Decay
Bhairavi embodies the principle of destruction and arises or becomes present when the body declines and decays. She is an ever-present goddess who manifests herself in, and embodies, the destructive aspects of the world. Destruction, however, is not always negative, creation cannot continue without it. Read Bhairavi Mantra

Dhumawati - the Goddess who widows Herself
she is the embodiment of "unsatisfied desires." Her status as a widow itself is curious. She makes herself one by swallowing Shiva, an act of self-assertion, and perhaps independence. Read Dhumavati Mantra

Bagalamukhi - the Goddess who seizes the Tongue
The pulling of the demon's tongue by Bagalamukhi is both unique and significant. Tongue, the organ of speech and taste, is often regarded as a lying entity, concealing what is in the mind. The Bible frequently mentions the tongue as an organ of mischief, vanity and deceitfulness. The wrenching of the demon's tongue is therefore symbolic of the Goddess removing what is in essentiality a perpetrator of evil. Read Bagalamukhi Mantra

Matangi - the Goddess who Loves Pollution
Texts describing her worship specify that devotees should offer her uccishtha (leftover food) with their hands and mouths stained with leftover food; that is, worshippers should be in a state of pollution, having eaten and not washed. This is a dramatic reversal of the usual protocols. Read Matangi Mantra

Kamala - the Last but Not the Least
The name Kamala means "she of the lotus" and is a common epithet of Goddess Lakshmi. Lakshmi is linked with three important and interrelated themes: prosperity and wealth, fertility and crops, and good luck during the coming year.  Read Kamala Mantra

In their strong associations with death, violence, pollution, and despised marginal social roles, they call into question such normative social "goods" as worldly comfort, security, respect, and honor. The worship of these goddesses suggests that the devotee experiences a refreshing and liberating spirituality in all that is forbidden by established social orders.

The central aim here is to stretch one's consciousness beyond the conventional, to break away from approved social norms, roles, and expectations. By subverting, mocking, or rejecting conventional social norms, the adept seeks to liberate his or her consciousness from the inherited, imposed, and probably inhibiting categories of proper and improper, good and bad, polluted and pure. Living one's life according to rules of purity and pollution and caste and class that dictate how, where, and exactly in what manner every bodily function may be exercised, and which people one may, or may not, interact with socially, can create a sense of imprisonment from which one might long to escape. Perhaps the more marginal, bizarre, "outsider" goddesses among the Mahavidyas facilitate this escape. By identifying with the forbidden or the marginalized, an adept may acquire a new and refreshing perspective on the cage of respectability and predictability. Indeed a mystical adventure, without the experience of which, any spiritual quest would remain incomplete.