I recently met author and podcaster Greg Voisen who spends a lot of time thinking and leading around creative and visual consulting. It was suggested to me to check out his podcast episode 407 where he speaks with author and visual consultant David Sibbet.
What I really appreciated from this conversation was the reminder of the importance of mental models. As a teacher (or seller or leader or service person), when you help your audience construct mental models - with literal or associative elements. If you listen - David suggests what a "spark" can mean to people based on their past experiences and interests.
When visualizing an experience - a talk, a meeting, a sales call, etc. - there is tremendous opportunity to reinforce those mental models. There are rabbit holes of ideas and information on both Greg and David's websites.