Sentimental irony is a dog that bays at the moon while pissing on graves.
(Karl Kraus (1874-1936), Austrian satirist. repr. In Half-Truths and One-And-A Half-Truths: Selected Aphorisms, "Riddles Out of Solutions," ed. Harry Zohn (1976). Sprüche und Widersprüche, ch. 6 (1909).)
I suppose that's one of the ironies of lifedoing the wrong thing at the right moment.
(Charlie Chaplin (1889-1977), British actor, screenwriter, director, and Orson Welles. Monsieur Henri Verdoux (Charles Chaplin), Monsieur Verdoux, said to Marie Grosnay (Isobel Elsom) as he tries to seduce her (1947).)
Irony is a clear consciousness of an eternal agility, of the infinitely abundant chaos.
(Friedrich Von Schlegel (1772-1829), German philosopher. Idea 69 in Selected Ideas (1799-1800), translated by Ernst Behler and Roman Struc, Dialogue on Poetry and Literary Aphorisms, Pennsylvania University Press (1968).)