34 The prudence of men of this cast is of ;hat kind which is termed by the Apostle Paul 'wisdom of the flesh" and "death" of the soul, `because it is not subject to the law of God, neither can it be."(32) Nothing is less calculated to emend such ills than prudence of this kind. For he enemies of the Church have for their object-and they hesitate not to proclaim it, and many among them boast of it - to destroy outright, if possible, the Catholic religion, which alone the true religion. With such a purpose in and they shrink from nothing, for they are fully conscious that the more faint - hearted those who withstand them become, the more easy will it be to work out their wicked will. Therefore, they who cherish the "prudence of the flesh" and who pretend to be unaware that every Christian ought to be a valiant soldier of Christ; they who would faro obtain the rewards owing to conquerors, while they are leading the lives of cowards, untouched in the fight, are so far from thwarting the onward march of the evil - disposed that, on the contrary, they even help it forward.
Source: Sapientiae Christianae (Vatican.va)