You don't know all the badness of the black man's heart.

You do not know the badness in the hearts of these people.

Nothing aggravates a cowboy so much, or makes him more desperate in his selection of tricks, as the affectation of badness on the part of a newcomer.

You can't educate all the badness out of children.

He is interested in the doings of other people, in their conduct and in his own; he is more interested in their badness than in their goodness: "Tell me more of the bad things your children do," said a little boy to his teacher aunt, and the request is significant and general; we learn so little by mere uncontrasted goodness.