Shelley compares man's ability to stay alive to the flickering light of a passing meteor. Our light of life is wavering and brief. He urges man to strive on and live life fully nevertheless.

In the third stanza, he compares earth to a mother and a nurse; it is that which comforts and sustains us and we are afraid to leave it. Again, however, Shelley argues that life must be lived anyway. Indeed, he argues that life (and poetry) is enhanced by its close relationship with death. The hopes of what will be after death must be united with the love for the here and now.