In the next place, referring to the statements of the Egyptians, who talk loftily about irrational animals, and who assert that they are a sort of symbols of God, or anything else which their prophets, so termed, are accustomed to call them, Celsus says that “an impression is produced in the minds of those who have learned these things; that they have not been initiated in vain;” while with regard to the truths which are taught in our writings to those who have made progress in the study of Christianity (through that which is called by Paul the gift consisting in the “word of wisdom” through the Spirit, and in the “word of knowledge” according to the Spirit), Celsus does not seem even to have formed an idea, judging not only from what he has already said, but from what he subsequently adds in his attack upon the Christian system, when he asserts that Christians “repel every wise man from the doctrine of their faith, and invite only the ignorant and the vulgar;” on which assertions we shall remark in due time, when we come to the proper place.
Source: Against Celsus (New Advent)