How could the Evil One fix the Soul in the Body?

And if they say that that Evil One fixed the Soul in the midst of the Body, in order that it might be imprisoned, how then did he not fix that Light, which is 'refined and goes out,' so that it could not go out ? And how did he fix a Nature which is incapable of being fixed ? For who is able to fix the Nature of fire to prevent its being divided in the flame of a lamp ? And although fire is amassed, it can be divided because it has not a fixed nature. But a ray of the sun a man cannot divide because it is fixed through and through in an indissoluble nature. But, if by reason of the entrance of the Soul into the Body which can be confined, that (Soul) was confined which was not confined (before), how is it that that Light, which, they say, is 'refined and departs,' was not confined along with its kinsman who was confined there (in the Body) ? And if it has self-knowledge because it is collected together and fixed, it is clear that those Parts which are not fixed are deaf-mutes without knowledge, and silent without speech, [P. 8.] and quiet without motion.