“Every great and original writer, in proportion as he is great and original, must himself create the taste by which he is to be relished.”

Source: Caesar and Cleopatra

Source: If You Want to Write: A Book about Art, Independence and Spirit

“Man has no nature”
History as a System (1962)

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 491.

L’écrivain original n’est pas celui qui n’imite personne, mais celui que personne ne peut imiter.
The Oxford Dictionary of Quotations (1979) 3rd edition
Variant translations:
The original style is not the style which never borrows of any one, but that which no other person is capable of reproducing.
As translated by Charles I. White (1856) Part 2, Book 1, Chapter 3
An original writer is not one who imitates nobody, but one whom nobody can imitate.
Bartlett's Familiar Quotations (1980) 15th edition.
Le génie du Christianisme (1802)

Source: The Task (1785), Book IV, The Winter Evening, Line 788.

Address (1 October 1832), quoted in William Flavelle Monypenny and George Earle Buckle, The Life of Benjamin Disraeli, Earl of Beaconsfield. Volume I. 1804–1859 (London: John Murray, 1929), p. 221
1830s

Vol. 2, p. 207; "Miscellany III".
Characteristicks of Men, Manners, Opinions, Times (1711)