Tertullian

Now by this time, you who argue about "Joseph" and "Daniel," know that things old and new, rude and polished, begun and developed, slavish and free, are not always comparable. For they, even by their circumstances, were slaves; but you, the slave of none, in so far as you are the slave of Christ alone, who has freed you likewise from the captivity of the world, will incur the duty of acting after your Lord's pattern.