Boethius (480-524)

A Treatise Against Eutyches and Nestorius

Translated by H. F. Stewart and E. K. Rand

Chapter 1

Nature, then, may be affirmed either of bodies alone or of substances alone, that is, of corporeals or incorporeals, or of everything that is in any way capable of affirmation. Since, then, nature can be affirmed in three ways, it must obviously be defined in three ways. For if you choose to affirm nature of the totality of things, the definition will be of such kind as to include all things that are. It will accordingly be something of this kind: “Nature belongs to those things which, since they exist, can in some measure be apprehended by the mind.” This definition, then, includes both accidents and substances, for they all can be apprehended by the mind. But I add “in some measure” because God and matter cannot be apprehended by mind, be it never so whole and perfect, but still they are apprehended in a measure through the removal of accidents. The reason for adding the words, “since they exist,” is that the mere word “nothing” denotes something, though it does not denote nature. For it denotes, indeed, not that anything is, but rather non-existence; but every nature exists. And if we choose to affirm “nature” of the totality of things, the definition will be as we have given it above.

But if “nature” is affirmed of substances alone, we shall, since all substances are either corporeal or incorporeal, give to nature denoting substances a definition of the following kind: “Nature is either that which can act or that which can be acted upon.” Now the power to act and to suffer belongs to all corporeals and the soul of corporeals; for it both acts in the body and suffers by the body. But only to act belongs to God and other divine substances.

Here, then, you have a further definition of what nature is as applied to substances alone. This definition comprises also the definition of substance. For if the word nature signifies substance, when once we have defined nature we have also settled the definition of substance. But if we neglect incorporeal substances and confine the name nature to corporeal substances so that they alone appear to possess the nature of substance—which is the view of Aristotle and the adherents both of his and various other schools—we shall define nature as those do who have only allowed the word to be applied to bodies. Now, in accordance with this view, the definition is as follows: “Nature is the principle of movement properly inherent in and not accidentally attached to bodies.” I say “principle of movement” because every body has its proper movement, fire moving upwards, the earth moving downwards. And what I mean by “movement properly inherent and not accidentally attached” is seen by the example of a wooden bed which is necessarily borne downward and is not carried downward by accident. For it is drawn downward by weight and heaviness because it is of wood, i.e. an earthly material. For it falls down not because it is a bed, but because it is earth, that is, because it is an accident of earth that it is a bed; hence we call it wood in virtue of its nature, but bed in virtue of the art that shaped it.

Nature has, further, another meaning according to which we speak of the different nature of gold and silver, wishing thereby to point the special property of things; this meaning of nature will be defined as follows: “Nature is the specific difference that gives form to anything.” Thus, although nature is described or defined in all these different ways, both Catholics and Nestorians firmly hold that there are in Christ two natures of the kind laid down in our last definition, for the same specific differences cannot apply to God and man.

Preface

Chapter 2