Origen: Stumbling Blocks in Scripture
The following is from Origen, On First Principles, 4.1.15. All emphasis is mine. (Also from CCEL.)
But since, if the usefulness of the legislation, and the sequence and beauty of the history, were universally evident of itself, we should not believe that any other thing could be understood in the Scriptures save what was obvious, the word of God has arranged that certain stumbling-blocks, as it were, and offences, and impossibilities, should be introduced into the midst of the law and the history, in order that we may not, through being drawn away in all directions by the merely attractive nature of the language, either altogether fall away from the (true) doctrines, as learning nothing worthy of God, or, by not departing from the letter, come to the knowledge of nothing more divine. And this also we must know, that the principal aim being to announce the “spiritual” connection in those things that are done, and that ought to be done, where the Word found that things done according to the history could be adapted to these mystical senses, He made use of them, concealing from the multitude the deeper meaning; but where, in the narrative of the development of super-sensual things, there did not follow the performance of those certain events, which was already indicated by the mystical meaning, the Scripture interwove in the history (the account of) some event that did not take place, sometimes what could not have happened; sometimes what could, but did not. And sometimes a few words are interpolated which are not true in their literal acceptation, and sometimes a larger number. And a similar practice also is to be noticed with regard to the legislation, in which is often to be found what is useful in itself, and appropriate to the times of the legislation; and sometimes also what does not appear to be of utility; and at other times impossibilities are recorded for the sake of the more skilful and inquisitive, in order that they may give themselves to the toil of investigating what is written, and thus attain to a becoming conviction of the manner in which a meaning worthy of God must be sought out in such subjects.
The more things change, the more they are the same! We discuss these same sorts of things today. The more I read Origen, the more I like him!