All parts of knowledge have their origin in metaphysics, and finally, perhaps, revolve into it.
Thomas de QuinceyThe whole body of the arts and sciences composes one vast machinery for the irritation and development of the human intellect.
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 QuinceyFar better, and more cheerfully, I could dispense with some part of the downright necessaries of life, than with certain circumstances of elegance and propriety in the daily habits of using them.
Thomas de Quincey