Silent water runs deep

They say that "silent water runs deep"

They say that "wise men speak because they have something to say and fools speak because they have to say something"

I say that when you don't know shit, keep your mouth shut or take the risk of opening it and everyone will find out that you have shit for brains

ps - Hehehe, I keep quiet most of the time, so I give the impression that I'm "deep" but in reality, I don't know shit