Concerning alchemy it is more difficult to discover the actual state of things, in that the historians who specialise in this field seem sometimes to be under the wrath of God themselves; for, like those who write of the Bacon-Shakespeare controversy or on Spanish politics, they seem to become tinctured with the kind of lunacy they set out to describe.
Herbert ButterfieldThe Whig interpretation of history ... is the tendency in many historians to write on the side of Protestants and Whigs, to praise revolutions provided they have been successful, to emphasise certain principles of progress in the past and to produce a story which is the ratification if not the glorification of the present.
Herbert ButterfieldIt is not a sin to introduce a personal bias that can be recognized and discounted. The sin in historical composition is the organization of the story in such a way that bias cannot be recognized.
Herbert Butterfield