Knowledge Doesn't Lead To Change. Understanding Does.

If I tell you, "There were a million heart attacks last year", unless you're one of those million, you don't care.
But if I can show you a picture of an artery, and you can see the plaque rupturing, now the heart attack isn't abstract, it's a real story. And you're much more likely to take care of your own heart because you don't want that same story to affect you.

Source: Dr. Mehmet Oz.