A learned historian declared to me of a contemporary, that the latter had appropriated his researches; he might, indeed, and he had a right to refer to the same originals; but if his predecessor had opened the sources for him, gratitude is not a silent virtue.
Isaac D'IsraeliThe greater part of our writers have become so original, that no one cares to imitate them: and those who never quote in return are seldom quoted.
Isaac D'IsraeliThe art of quotation requires more delicacy in the practice than those conceive who can see nothing more in a quotation than an extract. Whenever the mind of a writer is saturated with the full inspiration of a great author, a quotation gives completeness to the whole; it seals his feelings with undisputed authority.
Isaac D'Israeli