I often quote myself. It adds spice to my conversation. – George Bernard Shaw

Perish the men who said our good things before us! – Aelius Donatus, quoted in Edge-Tools of Speech by Maturin M. Ballou, 1886

Children seldom misquote. In fact, they usually repeat word for word what you shouldnt have said. – Anon.

You could compile, I should think, the worst book in the world entirely out of selecting passages from the best writers in the world. – G.K. Chesterton, “On Writing Badly”