Vocabulary lesson

There are just some days when you really, finally, down-to-your-toes, know what it means to be

aghast

appalled

gob-smacked

ashamed

and you look at the people you know and the people you just pass by on the street, and you wonder
How can it be that we are all human?
How can those people, those normal-seeming people walking around just like me, have their heads full of such nonsense?
And then you remember, Human is just a name for a species. Nothing about that means we're going to like each other.