The oath I took as a [meat] inspector said if I ever saw anything wrong I was supposed to report it. But today, if you blow your whistle, you're in trouble with the inspection service. I feel the oath I took is violated every day I work.
—William Freeman
antithesis
A figure of speech in which words and phrases with opposite meanings are balanced against each other. An example of antithesis is "To err is human, to forgive, divine." (Alexander Pope)