In Patrick O'Brian's "Post Captain," the idea that compulsion can destroy friendship is explored deeply. The narrative suggests that when relationships are burdened by pressure and obligation, the genuine connection between individuals can easily crumble. This highlights the importance of voluntary affection and mutual respect in maintaining strong bonds.

The quote serves as a poignant reminder that true friendships thrive on freedom and choice rather than coercion. When friends feel compelled to act or think in certain ways, it stifles authenticity and can lead to resentment. O'Brian's work emphasizes the value of nurturing relationships where both parties feel secure and unforced, ultimately enriching their companionship.