Part of the joy of re-reading a book you loved in the past is getting to notice elements of writing craft that you cannot see the first time through.
For example, in Mary Doria Russell’s The Sparrow, there is early-on (Chapter 6) a very short scene in which the main character is being badgered by a reporter. His friend and protector “went through the door low and fast. The momentum of his drive slammed the intruder into a wall…” We as readers are told that this incident is “literally nightmarish” for our lead, but we have no idea why, nor do we know we’ve just had a bit of foreshadowing. That gift awaits us only if we revisit those early pages after reading the whole book.
In our age, many of us find it hard enough to finish a good book the first time through, let alone to tackle a second reading. But the second reading is where we find meanings impossible to see without the repeated exposure.
The same is true of Bible study. So much is there, waiting for us to find it, but we are best served by repeated readings. Our patient study and revisiting of Scripture grant us insights and blessings we rarely are able to see the first time through.