15 But let us come to the lessons before us. You see that permission is given to the devil, that the good may be tested. The evil one envies all progress in good, he tempts us in various way. He tried holy Job in his possessions, in his children, in pain of body. The stronger is tried in his own person, the weaker in that of another. And he was desirous of carrying off my riches which I possess in you, and wished to dissipate this patrimony of your tranquillity. And he strove to deprive me of yourselves also, my good children, for whom I daily renew the Sacrifice, you he endeavoured to involve in the ruin as it were of a public disturbance. I have then already been assailed by two kinds of temptation. And perhaps because the Lord our God knows me to be too weak, He has not yet given him power over my body. Though myself may desire it, though I offer myself, He deems me yet it may be unequal to this conflict, and exercises me with various labours. And Job did not begin with that conflict but finished with it.
Source: Letters (New Advent)