«كُل مَاعُونْ يِنْضَحْ بِمَا فِيهْ»

The saying holds that what comes out of a person shows what is inside them. The image is of an ordinary household container, such as a pot, dish, or basin, seeping its contents. Speech, conduct, and attitude are treated as natural overflow from character, so a person's true disposition eventually surfaces in how they act and talk.

It also suggests that nobody can offer what they lack. A coarse person produces coarseness and a kind one produces kindness. Others' behavior is read as self-revelation, not as a verdict on the person it targets.

Apply this when someone's words or actions seem to expose their underlying nature, whether a spiteful remark or a generous gesture. Because it can sound like a pointed judgment of the speaker, use it with care when the person described is present.