Faith & Spirit Quote by Daniel Defoe

Defoe’s line flatters you into discipline by pretending it’s spiritual truth. The soul isn’t a halo here; it’s a commodity, a “rough diamond” whose value exists but doesn’t count until labor makes it legible. That metaphor does a lot of quiet ideological work. A diamond is rare, hard, and inherently precious, yet useless to the world until it’s cut. Translation: whatever inner worth you believe you have, society won’t recognize it without self-improvement that looks like effort, restraint, and refinement.

Coming from a journalist and entrepreneurial writer who lived through Britain’s exploding print culture, early capitalism, and a rising middle class hungry for moral instruction, the image lands as a Protestant work-ethic pep talk with market logic baked in. Polishing is not discovery; it’s manufacture. Defoe implies the self is raw material, and virtue is a kind of finishing process - education, manners, piety, habit - that turns private potential into public “luster.” The subtext is both encouraging and coercive: you are responsible for your own shine, and if you don’t shine, you’ve failed a duty.

It also smuggles in anxiety about appearance. “Luster” is what others see, the social proof of inner quality. The soul might be real, but its payoff is reputational. Defoe isn’t asking you to be good in the dark; he’s warning that unpolished goodness may as well not exist. That’s why the quote endures: it offers meaning, then attaches it to a to-do list.