Even before the universe came into existence, Lord Shiva worshipped Goddess Adi-Parashakti for the creation of universe.
She is the one who fulfills the wishes of her devotees and bestows them with intellect. She also provides siddhis to her devotees and it is said that Lord Shiva too got all siddhis by the grace of Maa Siddhidayini.
As she had no form of her own, Adi-Parashakti appeared in form of Goddess Siddhiatri from the left of Lord Shiva, hence she was named Siddhidayini.
Maa Siddhidayini is the supreme goddess of wisdom, power and energy. She is seen sitting atop a lotus flower mounted over a lion. She is represented with four hands, in lower right hand she carries a 'Gada', her upper right hand carries 'Chakra', her lower left hand carries a 'Lotus flower' and upper left hand carries a 'Shankh'.
Maa Siddhidayini is worshipped by all, deva, asur, yaksha, siddha, gandharva. It is also said that Lord Shiva got his titled Ardh-Narishwar only after Adi-Parashakti appeared on his left half.
It is said that Goddess Parvati at the age of sixteen grew up to be extremely beautiful and fair complexioned. Thus she was bestowed with name Mahagauri, the Goddess with fairness, purity and deep devotion.
Upon worshipping her on the eight day of Navratri; Maa Mahagauri's devotees are bestowed with immense prosperity and success.
