The argument appears to be this:—The Anomœans assert, on the ground that He is created, that the Son’s essence is τρεπτὸν, liable to change; where there is the possibility of change, the nature must have a capacity of inclining one way or the other, according to the balance of will determining to which side the nature shall incline: and that this is the condition of the angels may be seen from the instance of the fallen angels, whose nature was inclined to evil by their προαίρεσις. It follows that to say the Son is τρεπτὸς implies that He is on a level with the angelic nature, and might fall even as the angels fell.