In this passage, Seneca highlights the dual nature of the human soul, portraying it as having qualities of both a king and a tyrant. When the soul acts like a king, it prioritizes values that maintain the body's well-being and aligns with honorable pursuits. This behavior nurtures a healthy existence, steering clear of petty or degrading indulgences.
Conversely, when the soul succumbs to uncontrolled desires and excesses, it transforms into a tyrant. This tyrannical state leads to a life driven by base impulses, which can harm both the individual and those around them. Seneca's comparison serves as a reminder to cultivate self-control to prevent our inner ruler from becoming a destructive force.