No man is capable of translating poetry, who, besides a genius to that art, is not a master both of his author's language and of his own; nor must we understand the language only of the poet, but his particular turn of thoughts and expression, which are the characters that distinguish, and as it were individuate him from all other writers. When we are come thus far it is time to look into ourselves, to conform our genius to his, to give his thought either the same turn, if our tongue will bear it, or, if not, to vary but the dress, not to alter or destroy the substance.
John Dryden, Preface to Ovid's Epistles (1680).