Dhumavati - Mahavidhya

Dhumavati is one of the Devis in the Mahavidya sect of Hinduism. She is a "widow" devi and has a temple in Varanasi. She is often depicted with crows and a chariot.

Image of Satguru Sivaya Subramuniyaswami
Yes, willpower is the key, the must, the most needed faculty for spiritual unfoldment on this path. Work hard, strive to accomplish, strengthen the will by using the will.
—Gurudeva