Most Egyptian gods represented one principle aspect of the world: Ra was the sun god, for example, and Nut was goddess of the sky. The characters of the gods were not clearly defined. Most were generally benevolent but their favor could not be counted on. Some gods were spiteful and had to be placated. Some, such as Neith, Sekhmet, and Mut, had changeable characters. The god Seth, who murdered his brother Osiris, embodied the malevolent and disordered aspects of the world.