Saying one thing while meaning another, often the opposite. The true sense is left to the reader or listener.
In The Brothers Karamazov
and for a decent man it is even inconvenient to go to your paradise, if it exists at all. As for me, he fell asleep and never woke, and there is nothing more; remember me if you like, and if you don't, may the devil carry you off. Such is my philosophy.
To say that it is "inconvenient" for a decent man to go to paradise reverses the sense of decency. The sentence feigns courtesy to mock the very idea of salvation, and the polished tone makes the mockery sharper.
Book IV: The disturbances, Fyodor Pavlovich to Alyosha, the morning after the beating