better mousetrap, (if one can) build a

A minor but important improvement will bring fame and fortune. This idea came from a speech Ralph Waldo Emerson made in 1871 and quoted (or misquoted) by Mrs. Sarah S. B. Yule. Emerson allegedly said, “If a man can write a better book, preach a better sermon, or make a better mousetrap than his neighbor . . . the world will make a beaten path to his door.”