Sonnet 116 by William Shakespeare is a profound exploration of the nature of true love. Shakespeare begins by asserting that true love is unwavering and does not admit any obstacles. It remains constant even when circumstances change or when someone attempts to disrupt it. He uses the metaphor of a 'fixed mark' and a 'star' to describe love's steadfastness, suggesting that it guides and remains unshaken by life's tempests. The sonnet also addresses the passage of time, asserting that true love is not subject to time's effects, even as physical beauty fades. The poem concludes with a bold claim: if Shakespeare's understanding of love is incorrect, then no one has ever truly loved. This sonnet is celebrated for its eloquent depiction of love as eternal and unchanging, a theme that resonates across time.