The Congregation of the Index examines books and forbids those which are false and immoral. Christians have need of some learned and impartial authority to designate for them such books as they ought not to read, and all sincere men admit the usefulness of this warning; for many books are certainly unprofitable and injurious to every one. Even though civil governments have criticised the rules of the Index, they have not hesitated to adopt and use them as the nucleus of their legislation concerning the press. The oath imposed upon printers and booksellers, the deposit of a copy of each work before it is offered for sale, the obligation of placing upon the title-page the name of the printer, and of the signature of the writers to articles in newspapers, are all embodied in the rules of Clement VII. The prescriptions of the Index forbid the distribution of manuscript and printed books which have not been duly approved, in the same manner as the state prohibits those which have not been duly stamped; except that the church has not invented stamps, nor does a revenue result from its prescriptions. Moreover, the state demands an approbation, or, in other words, exercises a censorship, which, though now very greatly decried, is still enforced in regard to plays, and, when occasion demands, to other publications also. There is merely this difference, that the church causes its books to be examined by bishops, by cardinals, by men who are at once learned and impartial, while civil governments confide this responsibility to men who are often more ignorant and less careful of morality than the authors whom they control. The state has indeed adopted the institution of the church, but it has greatly perverted it. The decisions of this congregation are binding in all places; not because the tribunal is infallible, but because it is supreme, and because the popes have extended its authority over the whole church. Some, like the Gallicans, have claimed the validity of their contrary usages; but no custom can avail against law, especially when it is universally acknowledged that the power of the lawgiver extends over the whole world, and that no person, whatever his rank, or titles, or privileges, is exempt from its decrees.