Originality
"The merit of originality is not novelty; it is sincerity. The believing man is the original man; whatsoever he believes, he believes it for himself, not for another." - Thomas Carlyle, On Heroes, Hero-Worship and the Heroic in History
"Originality, I fear, is too often only undetected and frequently unconscious plagiarism." - Inge, William Ralph [Dean] (1860-1954) in 'Wit and Wisdom'