If only, everyone were both deaf and mute (And even better if blind), the world would become a much better place.

Because, when someone gets angry, they use words and usually, they don't mean to say these words but say it anyway. So, if everyone were deaf, they wouldn't be able to hear anything this angry person had that would give him time for him to knock himself on the head and realise that he is just making a stupid mistake.

Ignorance IS bliss