What does the term eye of heaven represent in poem shall you compare thee?

In the poem "Shall I Compare Thee to a Summer's Day?" by William Shakespeare, the phrase "eye of heaven" is used to refer to the sun. In the poem, Shakespeare compares his beloved to various beautiful and enduring things in nature, including the sun. The line about the eye of heaven emphasizes the bright, radiant beauty and life-giving power of his beloved, just as the sun is a source of light and life on Earth.