19.  Who could enumerate the full tale of his excellences, or, if he wished to pass by most of them, discover without difficulty what can be omitted?  For each trait, as it occurs to the mind, seems superior to what has gone before; it takes possession of me, and I feel more at a loss to know what I ought to pass by, than other panegyrists are as to what they ought to say.  So that the abundance of material is to some extent a hindrance to me, and my mind is itself put to the test in its efforts to test his qualities, and its inability, where all are equal, to find one which surpasses the rest.  So that, just as when we see a pebble falling into still water, it becomes the centre and starting-point of circle after circle, each by its continuous agitation breaking up that which lies outside of it; this is exactly the case with myself.  For as soon as one thing enters my mind, another follows and displaces it; and I am wearied out in making a choice, as what I have already grasped is ever retiring in favour of that which follows in its train.