The Ass in the Lion's Skin
An Ass, finding a Lion's skin, disguised himself with it, and ranged about the forest, putting all the beasts that saw him into bodily fear. After he had diverted himself thus for some time, he met a Fox, and, being desirous to frighten him too, as well as the rest, he leapt at him with some fierceness, and endeavoured to imitate the roaring of the Lion.
"Your humble servant," says the Fox, "if you had held your tongue, I might have taken you for a Lion, as others did; but now you bray I know who you are."
A silent man may pass for a wise man, but when we hear him speak we are able to form an estimate of his value.