"For particulars, as everyone knows, make for virtue and happiness; generalities are intellectually necessary evils."
An assembly line of workers at a Ford factory, 1913, each man focused on his specific task.
Public DomainAn assembly line of workers at a Ford factory, 1913, each man focused on his specific task. - Credit: Wikimedia Commons

A philosophical observation from the Director of the Hatcheries. Individuals who are more focused on the particulars of their specific tasks (the workers) are more useful members of society than those who look for profound meaning and truths behind their existence (the thinkers). This is because the workers' lives revolve around keeping the community going, but thinkers - who question all aspects of life - will only de-stabilise it. 

This is an important theme that runs through the book.