“[A]s we have compounded healthful drugs from certain of the reptiles; so from secular literature we have received principles of inquiry and speculation, while we have rejected their idolatry, terror and pit of destruction.  Nay, even those have aided us in our religion, by our perception of the contrast between what is worse and what is better, and by gaining strength for our doctrine from the weakness of theirs.”  --  Gregory of Nazianzen, Pangyric on St.Basil, sec. 11