Kali - Mahavidya

Kali stands on Shiva

Kali is one of the Mahavidyas. Krishna avatar of Vishnu is portrayed at the bottom.

Image of Satguru Sivaya Subramuniyaswami
Remember, your powers of observation are cultivated by abstinence from excessive talk. That is all you have to do to begin with--be more silent and observing, not wasting or dissipating this most vital power.
—Gurudeva