What is the main idea expressed in first two stanzas?

The main idea expressed in the first two stanzas is that human beings are not content with what they have and are always striving for more. This is conveyed through the images of the "circling sea," the "circling heaven," and the "circling sun," which suggest a never-ending cycle of desire. The speaker also uses the metaphor of a "fever" to describe this insatiable hunger, suggesting that it is a consuming force that cannot be easily controlled.