Origen

“ But if you will show me teachers who train young men for philosophy, and who exercise them in it, I will not from such turn away young men, but will try to raise them, as those who have been previously exercised in the whole circle of learning and in philosophical subjects, to the venerable and lofty height of eloquence which lies hid from the multitude of Christians, where are discussed topics of the greatest importance, and where it is demonstrated and shown that they have been treated philosophically both by the prophets of God and the apostles of Jesus. ”

“ You, at all events, in a case where fathers deemed the mysteries of philosophy an idle and unprofitable occupation for their sons, and for young men in general, would not, in teaching philosophy, make known its secrets before worthless parents; but, desiring to keep apart those sons of wicked parents who had been turned towards the study of philosophy, you would observe the proper seasons, in order that the doctrines of philosophy might reach the minds of the young men. And we say the same regarding our teachers. ”

“ But if, in the presence of a father who has a hatred of virtue and goodness, we keep silence, and also before those who teach what is contrary to sound doctrine, do not blame us for so doing, since you will blame us without good reason. ”