the corporeal and the incorporeal must be clearly kept in mind so as to avoid surprise at their difference, in spite of their union, if indeed it be permissible to apply the term "union" to their mutual relation; for we must not think of the union of corporeal substances, but of the union of substances whose properties are completely incompatible, according to the individuality of their hypostatic form of existence. Such union differs entirely from that of "homoousian" substances of the same nature; consequently, it is neither a blend, nor a mixture, nor a real union, nor a mere collocation. The relation between the corporeal and the incorporeal is established in a different manner, which manifests in the communication of "homoousian" substances of the sense nature, of which, however, no corporeal operation can give any idea. The incorporeal being is wholly without extension in all the parts of the extended being, even though the number of these parts were infinite. "It is present in an indivisible manner, without establishing a correspondence between each of its parts with the parts of the extended being;" it does not become manifold merely because, in a manifold manner, it is present to a multitude of parts. The whole of it is entire in all the parts of the extended being, in each of them, and in the whole mass, without dividing or becoming manifold to enter into relations with the manifold, preserving its numerical identity.[339] It is only to beings whose power is dispersed that it belongs to possess the intelligible by parts and by fractions. Often these beings, on changing from their nature, imitate intelligible beings by a deceptive appearance, and we are in doubt about their nature ("being"), for they seem to have exchanged it for that of incorporeal "being," or essence. THE INCORPOREAL HAS NO EXTENSION.