Great heroes appear mighty and grand. Their heads reach the sky and their feet touch the netherworld.

This couplet paints a vivid picture of an extraordinarily powerful warrior. It describes him as so grand and mighty that his head touches the sky, while his feet extend all the way down to the netherworld. This isn't meant literally, but rather emphasizes his immense stature and overwhelming presence. It conveys a sense of awe and wonder at his strength and vastness, suggesting that his influence spans the entire universe, from the highest heavens to the deepest realms. It truly brings to life the magnificent scale of a great hero's power and reach.