what is the song circle of life about

The balance of nature: The lyrics describe the delicate balance between life and death, with the sun nourishing the land and animals playing their roles in the ecosystem.
The cycle of life: The song emphasizes the constant flow of life, from birth to death and back again. It’s a circle, with each stage necessary for the continuation of the whole.
The responsibility of leadership: The lyrics sung by Rafiki, the mandrill shaman, indirectly touch upon the weight of leadership. As Simba is presented as the future king, the circle of life signifies the responsibility that comes with ruling the Pride Lands and maintaining the balance.
The majesty and wonder of life: The music and lyrics evoke a sense of awe and wonder at the natural world and the interconnectedness of all living things.

The song sets the stage for the entire movie by introducing these core themes and establishing the vastness and importance of the Pride Lands.