Chinnamasta - Mahavidya

Chinnamasta (Candanayika) with Her Two Attendants

Chinnamasta, the "Self-Decapitating Goddess, is mentioned in the Mahabhagavata Purana and Svatantra-Tantra, the symbolism of this story has various interpretations, including the concept of self-sacrifice, the awakening of the kundalini, and self-control of sexual desire, as well as ida, pingala and sushumna.

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