Understanding of lessons ---language

When Dr.Tan said :"Our mouth is the gun, the tongue is a bullet."Suddenly I realised that how powerful the language is!It enable us communicate in various places. We can also use language to make a living.When our thinking needs to be someone else to understand,we have to dependent on  language.By the same token,as a designer, we have to make  perfect elaboration for our products.So as to be understand by customers.Who says language is not a kind of art?