5. Now, if our having shown above that Christ possessed a rational soul should cause a difficulty to any one, seeing we have frequently proved throughout all our discussions that the nature of souls is capable both of good and evil, the difficulty will be explained in the following way. That the nature, indeed, of His soul was the same as that of all others cannot be doubted, otherwise it could not be called a soul were it not truly one. But since the power of choosing good and evil is within the reach of all, this soul which belonged to Christ elected to love righteousness, so that in proportion to the immensity of its love it clung to it unchangeably and inseparably, so that firmness of purpose, and immensity of affection, and an inextinguishable warmth of love, destroyed all susceptibility (_sensum_) for alteration and change; and that which formerly depended upon the will was changed by the power of long custom into nature; and so we must believe that there existed in Christ a human and rational soul, without supposing that it had any feeling or possibility of sin. 6. To explain the matter more fully, it will not appear absurd to make use of an illustration, although on a subject of so much difficulty it is not easy to obtain suitable illustrations. However, if we may speak without offence, the metal iron is capable of cold and heat. If, then, a mass of iron be kept constantly in the fire, receiving the heat through all its pores and veins, and the fire being continuous and the iron never removed from it, it become wholly converted into the latter; could we at all say of this, which is by nature a mass of iron, that when placed in the fire, and incessantly burning, it was at any time capable of admitting cold? On the contrary, because it is more consistent with truth, do we not rather say, what we often see happening in furnaces, that it has become wholly fire, seeing nothing but fire is visible in it? And if any one were to attempt to touch or handle it, he would experience the action not of iron, but of fire. In this way, then, that soul which, like an iron in the fire, has been perpetually placed in the Word, and perpetually in the Wisdom, and perpetually in God,[239] is God in all that it does, feels, and understands, and therefore can be called neither convertible nor mutable, inasmuch as, being incessantly heated, it possessed immutability from its union with the Word of God. To all the saints, finally, some warmth from the Word of God must be supposed to have passed; and in this soul the divine fire itself must be believed to have rested, from which some warmth may have passed to others. Lastly, the expression, “God, thy God, anointed thee with the oil of gladness above thy fellows,”[240] shows that that soul is anointed in one way with the oil of gladness, _i.e._ with the word of God and wisdom; and his fellows, _i.e._ the holy prophets and apostles, in another. For they are said to have “run in the odour of his