Origen

(in Matt. tom. xii. 39) Or else, fullers upon earth may by a moral interpretation be considered to be the wise of this world, who are thought to adorn even their foul understandings and doctrines with a false whitening drawn from their own minds. But their skill as fullers cannot produce any thing like a discourse which shews forth the brightness of spiritual conceptions in the unpolished words of Scripture, which by many are despised.