Famous Quote

The sheer bulk of online quotations, combined with more efficient search engines, has effectively made the Internet the world's quotation storehouse, encompassing an unprecedented number of easily obtainable quotations. Though matters of accuracy still remain, features such as Amazon.com's Search Inside the Book and Google Book Search may serve to alleviate such concerns.
Copyright law
Section 30(1) of the UK Copyright, Designs and Patents Act 1988 (apparently in transposition of Article 5(3)(d) of the EU Copyright Directive on "quotations") allows "fair dealing" with a copyright work for the purpose of criticism or review, provided that it is accompanied by a sufficient acknowledgement.