How does Roger Zelazny use imagery in Lord of Light?

Imagery:

"Mara's teeth bared in a snarl. His neck was as thick as a bull's. His biceps were as big about as a man's thighs. his chest was a barrel of strength and his legs were like great trees of the forest."

"They came. out of the sky, riding on the polar winds, across the seas and the land, over the burning snow, and under it and through it, they came."