The normal and the retard

The TV show is talking about a mister who has been trapped inside a cage for 30 years and now being taken care by a social welfare organisation.

He is defined as "The retarded" and people will show their sincere regards but I wonder if we really understand him.

I mean, from his eye, we are the abnormal, slaving like hell and whinning all day without having the happiness or satisfaction that he always has.