"There is a deeper symbolism. The black image of Kali is standing on the white image of Lord Shiva. Shiva is Brahman and Kali is Brahman’s energy, Shakti. Brahman is passive while Shakti – Kali –is active. The images so stand that Shiva looks at Kali and Kali at Shiva. This symbolizes the fact that every action, big or small, of destruction or creation, performed by Kali at the instance of Shiva. Kali, as it were, is the working organ of Shiva. Shiva and Kali, Brahman and Shakti, the source and energy, are essential one."
January 1, 1970
https://en.wikiquote.org/wiki/Shiva