Then [Gaia] bore the Cyclopes, who have very violent hearts, Brontes (Thunder) and Steropes (Lightning) and strong-spirited Arges (Bright), those who gave thunder to Zeus and fashioned the thunderbolt. These were like the gods in other regards, but only one eye was set in the middle of their foreheads;[57] and they were called Cyclopes (Circle-eyed) by name, since a single circle-shaped eye was set in their foreheads. Strength and force and contrivances were in their works.