The united voice of millions cannot lend the smallest foundation to falsehood.

Goldsmith’s line asserts that truth is not established by popularity. Even if “millions” agree, their consensus cannot supply real evidence for what is false; at most it can create social pressure, fashion, or prejudice. The remark is a pointed rebuke to appeals to majority opinion (argumentum ad populum) and to the way public sentiment can harden into “common sense” without grounding in fact. In an eighteenth-century context—an age of party politics, pamphleteering, and reputational warfare—it also reads as a defense of independent judgment: reason and reality, not collective acclaim, are the proper foundations for belief.