A Galileo could no more be elected president of the United States than he could be elected Pope of Rome. Both high posts are reserved for men favored by God with an extraordinary genius for swathing the bitter facts of life in bandages of self-illusion.

Mencken contrasts the empirical, truth-telling temperament of a scientist like Galileo with the political and ecclesiastical skills required to attain the highest offices. The point is not merely that institutions resist inconvenient facts, but that leadership in mass democracies and hierarchical churches often depends on a cultivated capacity for comforting narrative—what he calls “self-illusion.” By pairing the U.S. presidency with the papacy, Mencken suggests that very different systems can converge in rewarding the same psychological and rhetorical traits: optimism, piety, and the ability to soften harsh realities for public consumption. The quote exemplifies Mencken’s characteristic skepticism toward popular politics and organized religion, and his belief that truth and power rarely align.