Why we do not understand each other? Because we have a machine that expresses our thoughts thorough the voice, through words! These words do not reflect the truth, but only part of truth. So a person in one group understands someone in the same group. Each group has its own language and this is why, people cannot understand each other.  It happens also that people do not understand each other even when they speak the same language. This is how, as it happens in families, people do not understand each other although they talk about the same thing……