All parts of knowledge have their origin in metaphysics, and finally, perhaps, revolve into it.
Thomas de QuinceyThere is first the literature of knowledge, and secondly, the literature of power. The function of the first is--to teach; the function of the second is--to move, the first is a rudder, the second an oar or a sail. The first speaks to the mere discursive understanding; the second speaks ultimately, it may happen, to the higher understanding or reason, but always through affections of pleasure and sympathy.
Thomas de QuinceyAs is the inventor of murder, and the father of art, Cain must have been a man of first-rate genius.
Thomas de Quincey