Conventional wisdom says humans are creatures of images. However, really understanding a subject requires words (and complete sentences). Amazon’s Jeff Bezos gets this:
“When you have to write your ideas out in complete sentences, complete paragraphs it forces a deeper clarity.”
So save the PowerPoint (or Keynote) for the stage and podium. If you really want people to take you seriously, put your thinking into a stream of nouns, verbs and punctuation.