20. But the blessed Apostle Paul, taking precaution against this, as we have often shewn, warned us to be on our guard, saying: Take heed lest any man spoil you through philosophy and vain deceit, according to the tradition of men, according to the elements of the world, and not according to Christ, in Whom dwelleth all the fulness of the Godhead bodily Col. ii. 8, 9.. Therefore we must be on our guard against philosophy, and methods which rest upon traditions of men we must not so much avoid as refute. Any concession that we make must imply not that we are out-argued but that we are confused, for it is right that we, who declare that Christ is the power of God and the wisdom of God, should not flee from the doctrines of men, but rather overthrow them; and we must restrain and instruct the simple-minded lest they be spoiled by these teachers. For since God can do all things, and in His wisdom can do all things wisely, for neither is His purpose unarmed with power nor His power unguided by purpose, it behoves those who proclaim Christ to the world, to face the irreverent and faulty doctrines of the world with the knowledge imparted by that wise Omnipotence, according to the saying of the blessed Apostle: For our weapons are not carnal but powerful for God, for the casting down of strongholds, casting down reasonings and every high thing which is exalted against the knowledge of God 2 Cor. x. 4, 5.. The Apostle did not leave us a faith which was bare and devoid of reason; for although a bare faith may be most mighty to salvation, nevertheless, unless it is trained by teaching, while it will have indeed a secure retreat to withdraw to in the midst of foes, it will yet be unable to maintain a safe and strong position for resistance. Its position will be like that which a camp affords to a weak force after a flight; not like the undismayed courage of men who have a camp to hold. Therefore we must beat down the insolent arguments which are raised against God, and destroy the fastnesses of fallacious reasoning, and crush cunning intellects which hit themselves up to impiety, with weapons not carnal but spiritual, not with earthly learning but with heavenly wisdom; so that in proportion as divine things differ from human, so may the philosophy of heaven surpass the rivalry of earth.