Clement of Alexandria

Men must then be saved by learning the truth through Christ, even if they attain philosophy. For now that is clearly shown "which was not made known to other ages, which is now revealed to the sons of men." For there was always a natural manifestation of the one Almighty God, among all right-thinking men; and the most, who had not quite divested themselves of shame with respect to the truth, apprehended the eternal beneficence in divine providence.