Origen

“ For who is ignorant of the statement that Jesus was born of a virgin, and that He was crucified, and that His resurrection is an article of faith among many, and that a general judgment is announced to come, in which the wicked are to be punished according to their deserts, and the righteous to be duly rewarded? And yet the mystery of the resurrection, not being understood, [1] is made a subject of ridicule among unbelievers. In these circumstances, to speak of the Christian doctrine as a secret system, is altogether absurd. ”

“ Moreover, all the mysteries that are celebrated everywhere throughout Greece and barbarous countries, although held in secret, have no discredit thrown upon them, so that it is in vain that he endeavours to calumniate the secret doctrines of Christianity, seeing he does not correctly understand its nature. ”