so that We might make all this a [lasting] reminder to you all, and that every wide-awake ear might consciously take it in.

That We might make it a Message unto you, and that ears (that should hear the tale and) retain its memory should bear its (lessons) in remembrance.

That We might make it a memorial for you, and that remembering ears (that heard the story) might remember.

That We might make it a reminder for you, and that the retaining ear might retain it.

That We might make it for you a reminder and [that] a conscious ear would be conscious of it.