The quote reflects the exhausting nature of living in constant anger or heightened tension. It suggests that such a state can be detrimental to one's well-being, implying that a life marked by irritability is burdensome and draining. Having to navigate the world with a persistent edge can lead to significant emotional and mental fatigue.

This sentiment resonates throughout Patrick O'Brian's work, particularly in "The Commodore," where characters often grapple with internal and external conflicts. The idea of being "at half-cock" encapsulates a readiness for confrontation, but also highlights the instability and exhaustion that come from a life lived on the brink of anger.