"My opinion of the liberty of the press is that every man ought to be permitted to instruct his fellow subjects; that every man may fearlessly advance any new doctrines, provided he does so with proper respect to the religion and government of the country; that he may point out errors in the measures of public men; but he must not impute criminal conduct to them. The liberty of the press cannot be carried to this extent without violating another equally sacred right; namely, the right of character. This right can only be attacked in a court of justice, where the party attacked has a fair opportunity of defending himself"