Clement of Alexandria

For it is not spurious words which those inspired by God and those who are gained over by them adduce, nor is it snares in which the most of the sophists entangle the young, spending their time on nought true. But those who possess the Holy Spirit "search the deep things of God,"-that is, grasp the secret that is in the prophecies. "To impart of holy things to the dogs" is forbidden, so long as they remain beasts. For never ought those who are envious and perturbed, and still infidel in conduct, shameless in barking at investigation, to dip in the divine and clear stream of the living water.