Proverbs are always platitudes until you have personally experienced the truth of them.

Huxley suggests that proverbial wisdom often sounds trite because it is abstract—something we “know” only as a verbal formula. A proverb becomes meaningful only when lived experience supplies the emotional and practical evidence that makes its truth felt rather than merely assented to. The line points to the gap between secondhand knowledge and firsthand understanding: clichés are not necessarily false, but they remain inert until circumstances force us to inhabit them. It also implies a certain humility about judgment—what we dismiss as platitude may be hard-won insight for someone else, and our own experiences may later convert us to the same “obvious” truths.