Avoid all extremes

I just finished reading Jon Ronson's "Them: Adventures With Extremists". I thoroughly enjoyed this book about various people who believe the world is controlled by a small, elite and sinister group. The extremists are so paranoid they construe everything as a conspiracy, and at the end it does seem as if world events are actually affected by a highly influential group of people who meet "in secret", but as a member of this group says, it's not a conspiracy, it's just how things are.

Anyway, it so happened that today's Quiet Time Bible Study on Ecclesiastes contained this verse:

"It is good to grasp the one and not let go of the other. The man who fears God will avoid all extremes." (Ecclesiastes 7:18)