For think not that stones, and stocks, and birds, and serpents are sacred things, and men are not; but, on the contrary, regard men as truly sacred, and take beasts and stones for what they are.
…But ye, thus maimed as respects the truth, blind in mind, deaf in understanding, are not grieved, are not pained, have had no desire to see heaven and the Maker of heaven, nor, by fixing your choice on salvation, have sought to hear the Creator of the universe, and to learn of Him; for no hindrance stands in the way of him who is bent on the knowledge of God. Neither childlessness, nor poverty, nor obscurity, nor want, can hinder him who eagerly strives after the knowledge of God; nor does any one who has conquered by brass or iron the true wisdom for himself choose to exchange it, for it is vastly preferred to everything else.
Clement of Alexandria
Exhortation to the Heathen
Chapter X