Here is a verse of scripture with deep meaning. It expounds God`s foundational principles of how to educate people and how the grasp the foundational skills of instruction.
Isaiah 28:10 For precept must be upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little:

It may also contain a clue as to the identity of the mysterious Madam X.

Biblical riddles are used to stretch the mind in a positive way.  Here is a riddle put forth by Samson.

Judges 14:14 And he said unto them, Out of the eater came forth meat, and out of the strong came forth sweetness. And they could not in three days expound the riddle.

Here is a book which was published in 2000, using Samson`s riddle as a template.