It's not the gay coat that makes the gentleman.

Fine or eye-catching clothes do not make someone a person of good character. The proverb contrasts outward appearance with the qualities that deserve respect.

It suggests judging people by their conduct rather than by how impressively they dress. A polished appearance may create an impression, but it cannot establish integrity or kindness.

Use the proverb to challenge an assumption that elegant dress proves someone is respectable, or to emphasize a person's behavior over their appearance. It can also reassure someone that modest clothing does not diminish their worth.