2 For, my beloved, our adversary is skilful. He that contends against us is crafty. Against the brave and the renowned does he prepare himself, that they may be weakened. For the feeble are his own, nor does he fight with the captivity that are made captive to him. He that has wings flees from him and the darts that he hurls at him do not reach him. They that are spiritual see him when he assails, and his panoply has no power upon their bodies. All the children of light are without fear of him, because the darkness flies from before the light.
The children of the Good fear not the Evil, for He has given him to be trampled by their feet. When he makes himself like darkness unto them, they become light. And when he creeps upon them like a serpent, they become salt, whereof he cannot eat. If he makes himself like the asp unto them, then they become like babes. If he comes in upon them in the lust of food, they, like our Redeemer, conquer him by fasting. And if he wishes to contend with them by the lust of the eyes, they lift up their eyes to the height of heaven.
If he wishes by enticements to overcome them, they do not afford him a hearing. If he wishes openly to strive with them, lo! They are clothed in panoply and stand up against him. If he wishes to come in against them by sleep, they are wakeful and vigilant and sing psalms and pray. If he allures them by possessions, they give them to the poor. If he comes in as sweetness against them, they taste it not, knowing that he is bitter. If he inflames them with the desire of Eve, they dwell alone, and not with the daughters of Eve.
Source: Demonstrations (New Advent)