William Whitaker: Why God Allows Difficulties in Scripture.
In order to seek His help through prayer and interpreting them and discovering their true meaning.
To excite us so that we meditate, search and compare them.
Prevent us from losing interest in them
God willed to have that truth, so sublime, so heavenly, sought and found with so much labor, the more esteemed by us on that account. (Colossians 3:2)
Subdue our pride and arrogance and to expose to us our ignorance
God willed that the sacred mysteries of his word should be opened freely to pure and holy minds, not exposed to dogs and swine
God designed to call off our minds from the pursuit of external things and our daily occupations, and transfer them to the study of the scriptures
God desired thus to accustom us to a certain internal purity and sanctity of thought and feeling.
God willed that in his church some should be teachers, and some disciples; some more learned, to give instruction; others less skillful, to receive it; so as that the honor of the sacred scriptures and the divinely instituted ministry might, in this manner, be maintained.
William Whitaker, A Disputation on Holy Scripture, CHAPTER II. WHY GOD WOULD HAVE MANY OBSCURITIES IN THE SCRIPTURES, pg. 532-534.