Confession time: I started my career as a writer. I still love words and love to work with them. But the evidence is clear: words don't come close to visuals for sticking power.
If you want your audience to remember your message, don't rely on words alone. Check out this factoid: According to the Media Education Center, a 3M study found that humans process images 60,000 times faster than words. If you ponder that for a second, it makes sense. You can easily recall an image you saw yesterday, last week, or 10 years ago. But it's much harder to recall something you read. And that gets to the second point: not only do we process images faster, we retain them better than words. The communications expert Peter Temple says that information retention after three days rises from 10% to 65% if an image is added to words.
From an evolutionary point of view, you can see why this is true. We have been paying attention to our environments for hundreds of thousands of years, learning by looking. We have been reading for only a few thousand years. And even reading is actually the processing of images, since the brain learns letters and words as images themselves.
So why is this a bad blog post? For the same reason that PowerPoint is bad when the presenter reads the words on the screen out loud—it's just words. I should have added an image here, just as you should use compelling images in your presentations.