The Yorubas say, “The worm that eats the vegetable resides in the vegetable.” Similarly, an Igbo adage goes, “It is the rat that resides in the house that shows the outside rat how to navigate the house.” Remember the tale of the Trojan horse? When Troy couldn’t be conquered from the outside, the Greeks found a way in by hiding soldiers inside a wooden horse. The lesson is clear: sometimes, the greatest threat comes from within.