I haven’t posted anything about public speaking in a few weeks. Here’s a great post by one of my mentors on the use of illustrations in preaching (which has application to non-preaching public speaking as well, of course):
Illustrations are the life blood of a sermon. They create and hold interest, make a point clearer than the mere statement of it ever could, concretize abstract fact, show how to implement biblical requirements, and help make truth practical and memorable. What remarkable service illustrations can render; no wonder Christ used so many of them!