Heka literally means activating the Ka, the aspect of the soul which embodied personality. Egyptians thought activating the power of the soul was how magic worked. "Heka" also implied great power and influence, particularly in the case of drawing upon the Ka of the gods. Heka acted together with Hu, the principle of divine utterance, and Sia, the concept of divine omniscience, to create the basis of creative power both in the mortal world and the world of the gods.