Sonnet 15 by William Shakespeare addresses the ephemeral nature of youth and beauty. The poem notes how everything in nature, including men, grows to perfection for only a brief moment before fading. It then directly addresses the subject of the sonnet, telling them that their rich youth is currently on display but will soon give way to decay without the poet's ability to immortalize their beauty through verse. The sonnet promises that the poet will use his writing to effectively graft new youth onto the subject as their natural youth fades, fighting against the ravages of time through poetry.